This is resolved by a TradingLine oscillator and only when it switches to a new and different position from previous, will it trigger an Alert.
If you are in a Long and it signals Long again, then this is seen as a "Continuation Long" in the Alerts settings. You can use this condition to add to your existing position (Optional). Continuation signals are plotted as bright green/red dots.
You will notice there's an option to uncheck "Trade Shorts" and "Trade Exits" signals.
Lets say you choose not to trade Short and Exits, then your Long would only Exit once a Short signal is detected.
This could prove useful for Back-testing purposes.
This quick example script uses the 10, 200, emaPlus1Atr and emaMinus1Atr.
To use in your script, you will need to modify and add your own BUY/SELL/EXIT signals in the box where it says:
//// INPUT YOUR BUY/SELL/EXIT SIGNALS HERE: ////
Hope someone will find this useful, or even just as an additional visual confirmation for your own trading strategy and script.
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.