You can change:
- wether to show AfterHours High/Lows
- wether to show AfterHours price Spikes
- the AfterHours price Spike threshold (default = +/- 10%)
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.