Convert indicator to EA and add martingale

Hello

I have an indicator i use for trading but i would like to have it change to and EA that opens trades automatically.

So the process of the EA would be as follows:

when i add the ea on a chart, i will choose the direction i want to only open trade Buy or Sell.

and then i will input the lot size, then i will input the martingale number eg to mutiplyby 1, 1.1,1.2,1.5 etc

so when the ea shows an arrow towards upside it will open say 0.10 lot then wait for another arrow towards upside and open next lotsize 0.12 and continue till i close all trades of that pair then starts the process again from begining.