Modification of my supertrend indicator

Hi developers!

I found this indicator online which seems to working quite good for me.

Here you can find the indicator --> https://indicatorspot.com/indicator/supertrend-indicator-mt5/

I would need 3 things to be done for it.

1. Remove the dependencies from it. 

2. Add a green arrow bellow for long when the trend is changing and a red arrow on top of the candle when the trend is changing.

3. Remove the filling option.

If the future collaboration is running smoothly, we will work later to create an EA based on some other requirement using the updated indicator.

Let me know if you have experience in removing the dependencies for an indicator and the experience of creating EAs.

Thanks a lot!

Green pips to everyone!