You know exactly what your indicator should show. Writing it in MQL5 is where ideas get stuck.
This film shows the whole way from the idea to the finished MetaTrader 5 tool in 90 seconds:
You describe your idea in your own words, answer a few questions and see a prototype in your browser. When it fits, we build it, compile it and run it in the MetaTrader 5 Strategy Tester on two real brokers. Before you download the .ex5 file, you see the chart image from that check.
Clarification and three prototype rounds are free: https://buildyourtools.net/
Products or services listed here are not affiliated with or endorsed by Forex-station, unless explicitly stated.