---
title: "OTE-CR Spot Prices"
description: "Czech electricity spot prices from OTE-CR Day-Ahead Market. Track prices in EUR or CZK, find cheapest periods and automate energy use with TapHome."
url: "https://taphome.com/en/compatibility/ote-cr-spot-prices/"
language: en
lastmod: 2026-10-14
generator: hugo
ai:
  topics: ["http","data-pp","spot-prices","energy-market","electricity","data-service"]
  questions: ["How to get Czech electricity spot prices in TapHome?","How does the OTE-CR spot price template work?","How to convert OTE spot prices from EUR to CZK?","How to find the cheapest 15-minute electricity period of the day in TapHome?","How to automate devices based on electricity spot prices?","What is the Currency Exchange Rate device in the OTE-CR template?","How to link OTE-CR template with CNB exchange rate?"]
---

# OTE-CR Spot Prices

Communication: Packet Parser → HTTP

- [OTE-CR Day-Ahead Market](https://www.ote-cr.cz/cs/kratkodobe-trhy/elektrina/denni-trh)

## Integration guide

OTE-CR (Operátor trhu s elektřinou) is the Czech electricity and gas market operator. The TapHome template fetches Day-Ahead Market spot prices from the public OTE-CR API and exposes them as devices — current price, daily statistics, ranking, and time-window variants. Prices are published in EUR per MWh and the template includes a built-in currency conversion variable for displaying values in CZK.

The template polls the OTE-CR API once per hour and reads the Day-Ahead Market results for the current delivery day: 96 prices, one for each 15-minute period of the day (periods starting 00:00–23:45; Period 1 = 00:00–00:15, Period 96 = 23:45–24:00). No authentication is required — the API endpoint is public.

## Configuration

During template import, TapHome connects to `www.ote-cr.cz` over HTTPS (port 443). No IP address or credentials are needed — the endpoint is fixed.

Two optional import parameters control the time-window devices:

- **From** — start hour (0–23, default: 9) for the time window filter
- **To** — end hour (0–23, default: 17) for the time window filter

The defaults (9–17) cover standard working hours. Adjust to match your preferred analysis window.

After import, the `kurz` variable (shown and editable through the **Currency Exchange Rate** device) defaults to 1 — meaning all price devices display raw EUR/MWh values. Set it to the current EUR/CZK rate (e.g. 25.2) so that all price devices output values in CZK. You can set it manually in the device detail, or link it to the **CNB exchange rate** template for automatic daily updates (see below).

## Device capabilities

### Current price

The **Current Price** device reads the spot price for the current 15-minute period. The template determines the active period from the system clock and multiplies the EUR value by the exchange rate variable to output the price in CZK.

### Price ranking

- **Current Period Rank** — the rank of the current period's price among all 96 periods of the day (1 = cheapest, 96 = most expensive)
- **Current Period Rank in Time Window** — the same ranking but limited to the user-defined time window (From–To). Returns NaN if the current period falls outside the window.

### Daily price statistics

- **Highest Price of Day** — maximum spot price across all periods, converted to CZK
- **Lowest Price of Day** — minimum spot price across all periods, converted to CZK
- **Average Price of Day** — arithmetic mean of the prices of all periods, converted to CZK

### Time-window price statistics

Each daily statistic has a windowed counterpart that filters periods to the From–To range:

- **Highest Price in Time Window**
- **Lowest Price in Time Window**
- **Average Price in Time Window**

All windowed devices return NaN if From >= To.

### Period navigation

- **Cheapest Period of Day** — the number (1–96) of the cheapest 15-minute period of the day
- **Cheapest Remaining Period** — the cheapest 15-minute period from the current time onward
- **Period Count** — total number of 15-minute price periods in the API response (96 for a normal day)
- **Period Count in Time Window** — number of periods within the From–To range

### Currency Exchange Rate

The **Currency Exchange Rate** device is the only read-write device in the template. It stores the EUR to CZK conversion rate used by all price devices. Set it manually or link it to the **CNB exchange rate** template for automatic daily updates.

When the exchange rate is set to 1, all price devices output raw EUR values.

## Service attributes

The template exposes 96 service attributes (Period 1 through Period 96), each showing the raw spot price in EUR for one 15-minute period of the current delivery day. They are useful for diagnostics or for building custom automations that inspect specific periods of the day.

## Linking with CNB exchange rate

To automate the EUR to CZK conversion:

1. Import the **CNB exchange rate** template (Kurzy ČNB) into TapHome
2. In the OTE-CR template, create a formula that reads the EUR/CZK rate from the CNB device and writes it to the **Currency Exchange Rate** device
3. The CNB template updates the rate daily, so all OTE-CR prices automatically reflect the current exchange rate

## Automation examples

Spot prices are most useful when combined with TapHome Smart Rules:

- **Heat water during the cheapest periods** — compare the current period rank against a threshold (e.g. rank <= 8) and turn on the water heater only during the 8 cheapest 15-minute periods (2 hours) of the day
- **Charge batteries at off-peak** — use the Current Price device to trigger battery charging when the price drops below a configurable limit
- **Shift appliance load** — use the Cheapest Remaining Period device to schedule washing machines, dishwashers, or EV charging for the next cheapest slot
- **Time-window optimization** — restrict automation to specific hours (e.g. 6:00–22:00) using the windowed devices, so overnight periods are excluded from ranking

## Troubleshooting

### All prices show zero or NaN

1. Verify that TapHome CCU has internet access (the template connects to `www.ote-cr.cz` over HTTPS)
2. Check the **Period Count** device — if it shows 0, the API response is empty or parsing failed
3. Ensure the **Currency Exchange Rate** device is set to a non-zero value — a rate of 0 will multiply all prices to zero

### Time-window devices return NaN

1. Verify the From and To import parameters are set correctly (From must be less than To)
2. If the current hour is outside the From–To range, the rank-in-window device returns NaN by design

### Prices seem outdated

The template polls the OTE-CR API every hour (3600 seconds). Day-Ahead Market prices are published by OTE the day before, typically around 12:45 CET. If the new day's prices are not yet visible, wait until after the publication time.

## Available devices 14

These devices appear in TapHome after import.

OTE-CR Spot Prices Module

Service Attributes

|           |                                          |
|-----------|------------------------------------------|
| Period 1  | Spot price for 15-minute period 1 (EUR)  |
| Period 2  | Spot price for 15-minute period 2 (EUR)  |
| Period 3  | Spot price for 15-minute period 3 (EUR)  |
| Period 4  | Spot price for 15-minute period 4 (EUR)  |
| Period 5  | Spot price for 15-minute period 5 (EUR)  |
| Period 6  | Spot price for 15-minute period 6 (EUR)  |
| Period 7  | Spot price for 15-minute period 7 (EUR)  |
| Period 8  | Spot price for 15-minute period 8 (EUR)  |
| Period 9  | Spot price for 15-minute period 9 (EUR)  |
| Period 10 | Spot price for 15-minute period 10 (EUR) |
| Period 11 | Spot price for 15-minute period 11 (EUR) |
| Period 12 | Spot price for 15-minute period 12 (EUR) |
| Period 13 | Spot price for 15-minute period 13 (EUR) |
| Period 14 | Spot price for 15-minute period 14 (EUR) |
| Period 15 | Spot price for 15-minute period 15 (EUR) |
| Period 16 | Spot price for 15-minute period 16 (EUR) |
| Period 17 | Spot price for 15-minute period 17 (EUR) |
| Period 18 | Spot price for 15-minute period 18 (EUR) |
| Period 19 | Spot price for 15-minute period 19 (EUR) |
| Period 20 | Spot price for 15-minute period 20 (EUR) |
| Period 21 | Spot price for 15-minute period 21 (EUR) |
| Period 22 | Spot price for 15-minute period 22 (EUR) |
| Period 23 | Spot price for 15-minute period 23 (EUR) |
| Period 24 | Spot price for 15-minute period 24 (EUR) |
| Period 25 |                                          |
| Period 26 |                                          |
| Period 27 |                                          |
| Period 28 |                                          |
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| Period 90 |                                          |
| Period 91 |                                          |
| Period 92 |                                          |
| Period 93 |                                          |
| Period 94 |                                          |
| Period 95 |                                          |
| Period 96 |                                          |

Custom Variables

|                      |                                                                                                                |
|----------------------|----------------------------------------------------------------------------------------------------------------|
| `From` (numeric) = 9 | Start hour (0–23) of the time window for windowed price ranking and statistics                                 |
| `To` (numeric) = 17  | End hour (0–23) of the time window for windowed price ranking and statistics                                   |
| `kurz` (numeric) = 1 | EUR to CZK exchange rate multiplier — all prices are multiplied by this value (set to current rate, e.g. 25.2) |

Read (module)

```taphome
VAR today := tostring(NOW(), "yyyy-MM-dd");
VAR response := SENDHTTPREQUEST("/cs/kratkodobe-trhy/elektrina/denni-trh/chart-data");
IF response.IsSuccess
    output := response.Content;
ELSE
    ADDERROR(response.StatusCode + " (" + response.ReasonPhrase + ")");
END
```

Service Attributes

Perioda 1

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[0].y") + " EUR"
```

Perioda 2

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[1].y") + " EUR"
```

Perioda 3

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[2].y") + " EUR"
```

Perioda 4

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[3].y") + " EUR"
```

Perioda 5

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[4].y") + " EUR"
```

Perioda 6

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[5].y") + " EUR"
```

Perioda 7

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[6].y") + " EUR"
```

Perioda 8

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[7].y") + " EUR"
```

Perioda 9

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[8].y") + " EUR"
```

Perioda 10

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[9].y") + " EUR"
```

Perioda 11

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[10].y") + " EUR"
```

Perioda 12

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[11].y") + " EUR"
```

Perioda 13

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[12].y") + " EUR"
```

Perioda 14

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[13].y") + " EUR"
```

Perioda 15

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[14].y") + " EUR"
```

Perioda 16

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[15].y") + " EUR"
```

Perioda 17

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[16].y") + " EUR"
```

Perioda 18

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[17].y") + " EUR"
```

Perioda 19

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[18].y") + " EUR"
```

Perioda 20

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[19].y") + " EUR"
```

Perioda 21

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[20].y") + " EUR"
```

Perioda 22

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[21].y") + " EUR"
```

Perioda 23

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[22].y") + " EUR"
```

Perioda 24

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[23].y") + " EUR"
```

Perioda 25

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[24].y") + " EUR"
```

Perioda 26

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[25].y") + " EUR"
```

Perioda 27

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[26].y") + " EUR"
```

Perioda 28

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[27].y") + " EUR"
```

Perioda 29

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[28].y") + " EUR"
```

Perioda 30

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[29].y") + " EUR"
```

Perioda 31

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[30].y") + " EUR"
```

Perioda 32

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[31].y") + " EUR"
```

Perioda 33

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[32].y") + " EUR"
```

Perioda 34

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[33].y") + " EUR"
```

Perioda 35

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[34].y") + " EUR"
```

Perioda 36

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[35].y") + " EUR"
```

Perioda 37

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[36].y") + " EUR"
```

Perioda 38

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[37].y") + " EUR"
```

Perioda 39

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[38].y") + " EUR"
```

Perioda 40

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[39].y") + " EUR"
```

Perioda 41

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[40].y") + " EUR"
```

Perioda 42

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[41].y") + " EUR"
```

Perioda 43

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[42].y") + " EUR"
```

Perioda 44

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[43].y") + " EUR"
```

Perioda 45

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[44].y") + " EUR"
```

Perioda 46

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[45].y") + " EUR"
```

Perioda 47

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[46].y") + " EUR"
```

Perioda 48

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[47].y") + " EUR"
```

Perioda 49

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[48].y") + " EUR"
```

Perioda 50

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[49].y") + " EUR"
```

Perioda 51

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[50].y") + " EUR"
```

Perioda 52

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[51].y") + " EUR"
```

Perioda 53

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[52].y") + " EUR"
```

Perioda 54

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[53].y") + " EUR"
```

Perioda 55

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[54].y") + " EUR"
```

Perioda 56

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[55].y") + " EUR"
```

Perioda 57

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[56].y") + " EUR"
```

Perioda 58

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[57].y") + " EUR"
```

Perioda 59

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[58].y") + " EUR"
```

Perioda 60

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[59].y") + " EUR"
```

Perioda 61

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[60].y") + " EUR"
```

Perioda 62

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[61].y") + " EUR"
```

Perioda 63

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[62].y") + " EUR"
```

Perioda 64

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[63].y") + " EUR"
```

Perioda 65

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[64].y") + " EUR"
```

Perioda 66

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[65].y") + " EUR"
```

Perioda 67

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[66].y") + " EUR"
```

Perioda 68

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[67].y") + " EUR"
```

Perioda 69

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[68].y") + " EUR"
```

Perioda 70

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[69].y") + " EUR"
```

Perioda 71

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[70].y") + " EUR"
```

Perioda 72

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[71].y") + " EUR"
```

Perioda 73

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[72].y") + " EUR"
```

Perioda 74

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[73].y") + " EUR"
```

Perioda 75

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[74].y") + " EUR"
```

Perioda 76

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[75].y") + " EUR"
```

Perioda 77

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[76].y") + " EUR"
```

Perioda 78

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[77].y") + " EUR"
```

Perioda 79

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[78].y") + " EUR"
```

Perioda 80

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[79].y") + " EUR"
```

Perioda 81

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[80].y") + " EUR"
```

Perioda 82

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[81].y") + " EUR"
```

Perioda 83

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[82].y") + " EUR"
```

Perioda 84

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[83].y") + " EUR"
```

Perioda 85

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[84].y") + " EUR"
```

Perioda 86

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[85].y") + " EUR"
```

Perioda 87

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[86].y") + " EUR"
```

Perioda 88

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[87].y") + " EUR"
```

Perioda 89

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[88].y") + " EUR"
```

Perioda 90

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[89].y") + " EUR"
```

Perioda 91

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[90].y") + " EUR"
```

Perioda 92

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[91].y") + " EUR"
```

Perioda 93

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[92].y") + " EUR"
```

Perioda 94

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[93].y") + " EUR"
```

Perioda 95

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[94].y") + " EUR"
```

Perioda 96

```taphome
PARSEJSON(output, "$.data.dataLine[1].point[95].y") + " EUR"
```

Current Price Variable Read-only

Spot price of the current 15-minute period converted to CZK using the exchange rate variable

numeric Unit: CZK json\_path

Read

```taphome
var prices := PARSEJSON(output, "$.data.dataLine[1].point..y");
VAR date := NOW();
var periodHour := LENGTH(prices) / 24;	
var actualperiod := FLOOR(((date.hour * 60) + date.minute) * periodHour / 60);

ROUND(GETAT(prices, actualperiod)*kurz)
```

Current Period Rank Variable Read-only

Rank of the current 15-minute period among all 96 periods of the day (1 = cheapest)

numeric json\_path

Read

```taphome
var prices := PARSEJSON(output, "$.data.dataLine[1].point..y");
var byPrice := ORDERINDEX(prices);
VAR date := NOW();
var periodHour := LENGTH(prices) / 24;	
var actualperiod := FLOOR(((date.hour * 60) + date.minute) * periodHour / 60);

INDEXOF(byPrice, actualperiod) + 1
```

Current Period Rank in Time Window Variable Read-only

Rank of the current 15-minute period within the From-To time window (NaN if outside)

numeric json\_path

Read

```taphome
VAR date := NOW();
IF date.hour < From or date.hour > To or From >= To
	RETURN(NaN);
ELSE
	var prices := PARSEJSON(output, "$.data.dataLine[1].point..y");
	var periodHour := LENGTH(prices) / 24;
	var windowPrices := COPY(prices, From * periodHour, (To - From) * periodHour);
	var byPrice := ORDERINDEX(windowPrices);
	
	var actualperiod := FLOOR(((date.hour * 60) + date.minute) * periodHour / 60);

	RETURN(INDEXOF(byPrice, actualperiod - From * periodHour) +1);
END
```

Currency Exchange Rate Variable Read and write

EUR to CZK conversion rate — read/write, used by all price devices

numeric Unit: CZK/EUR

Read

```taphome
kurz
```

Write

```taphome
kurz := Va
```

Highest Price of Day Variable Read-only

Maximum spot price across all periods of the day (CZK)

numeric Unit: CZK json\_path

Read

```taphome
var prices := PARSEJSON(output, "$.data.dataLine[1].point..y");
GETAT(ORDERDESC(prices), 0)*kurz
```

Highest Price in Time Window Variable Read-only

Maximum spot price within the From-To time window (CZK)

numeric Unit: CZK json\_path

Read

```taphome
VAR date := NOW();
IF From >= To
	RETURN(NaN);
ELSE
	var prices := PARSEJSON(output, "$.data.dataLine[1].point..y");
	var periodHour := LENGTH(prices) / 24;	
	var actualperiod := FLOOR(((date.hour * 60) + date.minute) * periodHour / 60);
	var windowPrices := COPY(prices, From * periodHour, (To - From) * periodHour);
	var byPrice := ORDERDESC(windowPrices);

	RETURN(GETAT(byPrice, 0)*kurz);
END
```

Lowest Price of Day Variable Read-only

Minimum spot price across all periods of the day (CZK)

numeric Unit: CZK json\_path

Read

```taphome
var prices := PARSEJSON(output, "$.data.dataLine[1].point..y");
GETAT(ORDER(prices), 0)*kurz
```

Lowest Price in Time Window Variable Read-only

Minimum spot price within the From-To time window (CZK)

numeric Unit: CZK json\_path

Read

```taphome
VAR date := NOW();
IF From >= To
	RETURN(NaN);
ELSE
	var prices := PARSEJSON(output, "$.data.dataLine[1].point..y");
	var periodHour := LENGTH(prices) / 24;	
	#var actualperiod := FLOOR(((date.hour * 60) + date.minute) * periodHour / 60);
	var windowPrices := COPY(prices, From * periodHour, (To - From) * periodHour);
	var byPrice := ORDER(windowPrices);

	RETURN(GETAT(byPrice, 0)*kurz);
END
```

Cheapest Period of Day Variable Read-only

Number (1–96) of the cheapest 15-minute period of the day

numeric json\_path

Read

```taphome
var prices := PARSEJSON(output, "$.data.dataLine[1].point..y");
GETAT(ORDERINDEX(prices), 0) +1
```

Cheapest Remaining Period Variable Read-only

Number of the cheapest 15-minute period from the current time onward

numeric json\_path

Read

```taphome
var prices := PARSEJSON(output, "$.data.dataLine[1].point..y");
VAR date := NOW();
var periodHour := LENGTH(prices) / 24;	
var actualperiod := FLOOR(((date.hour * 60) + date.minute) * periodHour / 60);
var remainingPrices := COPY(prices, actualperiod, LENGTH(prices) - actualperiod);
var byPrice := ORDERINDEX(remainingPrices);

GETAT(byPrice, 0) + actualperiod +1
```

Period Count Variable Read-only

Total number of available price periods (typically 96)

numeric json\_path

Read

```taphome
var prices := PARSEJSON(output, "$.data.dataLine[1].point..y");
LENGTH(prices);
```

Period Count in Time Window Variable Read-only

Number of periods within the From-To time window

numeric json\_path

Read

```taphome
VAR date := NOW();
IF From >= To
	RETURN(NaN);
ELSE
	var prices := PARSEJSON(output, "$.data.dataLine[1].point..y");
	var periodHour := LENGTH(prices) / 24;
	var windowPrices := COPY(prices, From * periodHour, (To - From) * periodHour);

	RETURN(LENGTH(windowPrices));
END
```

Average Price of Day Variable Read-only

Average spot price across all periods of the day (CZK)

numeric Unit: CZK json\_path

Read

```taphome
var prices := PARSEJSON(output, "$.data.dataLine[1].point..y");
AVG(prices)*kurz
```

Average Price in Time Window Variable Read-only

Average spot price within the From-To time window (CZK)

numeric Unit: CZK json\_path

Read

```taphome
VAR date := NOW();
IF From >= To
	RETURN(NaN);
ELSE
	var prices := PARSEJSON(output, "$.data.dataLine[1].point..y");
	var periodHour := LENGTH(prices) / 24;	
	#var actualperiod := FLOOR(((date.hour * 60) + date.minute) * periodHour / 60);
	var windowPrices := COPY(prices, From * periodHour, (To - From) * periodHour);

	RETURN(AVG(windowPrices)*kurz);
END
```

**Connection:** Packet Parser → HTTP

## Related Documentation

- [Packet Parser Integration](https://taphome.com/en/compatibility/packet-parser-guide/)
- [Packet Parser (HTTP, TCP, UDP, FTP, MQTT)](https://taphome.com/en/docs/integration/packet-parser/)
- [Packet parser functions](https://taphome.com/en/docs/script/packet-parser/)
- [Parsing functions](https://taphome.com/en/docs/script/parsing-functions/)