As you will see, the indicators have red and blue lines. To buy an option for a price increase, you need to wait for the simultaneous intersection of the lines of both indicators when the blue lines are at the top and the red ones go down. And vice versa, to buy an option with a forecast of a fall in prices, the blue lines should go down and the red lines up.
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.