This indicator can work pretty well also with other indices or correlated assets such as nasdaq100 and dax40.
The spikes from one side of the channel or the orizzontal lines signal a possible entry signal for a spread trading strategy.
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.