EA or Script to control Autotrading in Mt4

Hello, I already have a martingale EA that is working fine, but i want to have some control measure, I only run the EA on my accounts in mt4 but does not have the source code as it is licensed. I need an independent program in form of an EA or script that will stop autotrading  when it gets to a specific lots. 

 Okay here is it, Program it in such a way that,

1. I will manually input which lot i want it to stop auto trading

2. I will be notified (via mail if possible) once auto trading is stoped 

3. It will re enable auto trading 50pips from the last lot it stopped auto trading