> ## Documentation Index
> Fetch the complete documentation index at: https://docs.siftstack.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Step 6: Create Calculated Channel and view it in Sift
export const SiftIcon = ({className}) => ;
## Overview
As in Step 6 of the first tutorial, let's create a Calculated Channel that computes the difference between `max_air_temp(C)` and `min_air_temp(C)` to capture the daily air temperature swing. This time, we will do it using the REST API instead of the UI. The endpoint we will use to create the Calculated Channel is [CreateCalculatedChannel](/api-reference/calculatedchannelservice/createcalculatedchannel).
## Create Calculated Channel
Run the cURL command below to create the Calculated Channel.
```bash theme={null}
curl -X POST "YOUR_REST_API_URL_HERE/api/v2/calculated-channels" \
-H "Authorization: Bearer YOUR_API_KEY_HERE" \
-H "Content-Type: application/json" \
-d '{
"name": "fl_demo_calculated_channel",
"calculatedChannelConfiguration": {
"assetConfiguration": {
"selection": {
"assetIds": ["ASSET_ID"]
}
},
"queryConfiguration": {
"sel": {
"expression": "$1 - $2",
"expressionChannelReferences": [
{
"channelReference": "$1",
"channelIdentifier": "max_air_temp(C)"
},
{
"channelReference": "$2",
"channelIdentifier": "min_air_temp(C)"
}
]
}
}
}
}'
```
**Placeholders**
* Replace `YOUR_REST_API_URL_HERE` with your REST API URL obtained in the previous step.
* Replace `YOUR_API_KEY_HERE` with your API key obtained in the previous step.
* Replace `fl` (in `fl_demo_calculated_channel`) with your initials.
* Replace `ASSET_ID` with the ASSET ID you copied in [Step 3](/old-learning-path/tutorial-2/step-3#view-imported-data-in-sift).
```bash theme={null}
{
"calculatedChannel": {
"calculatedChannelId": "string",
....
}
```
## Plot Calculated Channel in Sift
Now that we have created the Calculated Channel using the REST API, let's view the created Calculated Channel in Sift.
1. In **Sift**, click .
2. Click the **Runs** tab.
3. In the **Run name or description** box, enter the name of the created Run.
4. Click your Run from the search results to open it.
5. Click **Explore**.
6. In the **Channels** tab, click the following Channels:
1. **max\_air\_temp(C)**
2. **min\_air\_temp(C)**
7. Click the **Calculated Channels** tab.
8. In the **Calculated Channels** tab, click the name of the created Calculated Channel.