It is fully configurable, which means you can set the bars for calculation, the offset and sources for trigger and calculation.
The original purpose for me was to send a command to my bot. If you like it please comment and check out my other scripts.
In true TradingView spirit, the author of this script has published it open-source, so traders can understand and verify it. Cheers to the author! You may use it for free, but reuse of this code in a publication is governed by House Rules. You can favorite it to use it on a chart.