Add a simple Martingale function in my MARSI Expert Advisor

Hello, I need a martingale function in my Expert Advisor. Which i can adjust very easily like the MA value which you will see in the Expert Advisor. Also i want the settings that i can turn off and on the martingale function.

Function is when i lose a trade it should multiple x times the amount of lotsize. (the value x is set by myself)

Example: Trade 0.1 is a lose trade  

      next trade should be 0.2 for example when the multiplicator is 2.0

        if i lose again the next trade should be 0.4 lot and so on 0.8....1.6.....3.2.....6.4 (if the multiplicator is 2.0 but it also can be 2.1, 2.6 or 4.6)

It should be simply coded that i can add more indicator like if i want to add for an example a macd i could very easily understand what you wrote and add some indicator.

I would be very thankfull if you could do that.

Thanks

Greetings Daniel