Expert advisor MT4 building

hello Guys,
I’m planning to automate my trading strategy, and this is my first time I’m using peopleperhour website to implement my project, and I’m happy to receive your offers as soon as possible.
First, my EA is for trade management, to adjust the stop loss and take profit with the market action.
A. Open position:
1-Calculate the trade volume:
Trade volume should be automatically calculated when I click buy or sell on the MT4 terminal One click trading paddle, how?
1-the total amount of money needs to be risked in one trade, should be (%* Equity)
Ex: 2%*$90,000 = $1800, this % is changeable. Then we divide this number by the (ATR*multiplicator),
2-the volume = 1800$/(ATR*multiplicator), the multiplicator here is changeable also Let’s say here = 2, and ATR = 80, then $1800/ (80*2) =$11.25, this number is the pip value of 1.12 lots EURUSD.
3-Open the trade when I click buy or sell, I need the EA to open 3 consecutive trades, each one is a specified % from the total volume,
Ex: please find attached the MT4 screenshot.
This % should be changeable, and here for example we admit the rule of 70% 20% 10% for each trade.
NB: we can face a problem with the decimals, because I’m planning to use this EA, in stocks, currencies, indices cash and futures, gold silver and oil market. I suggest rounding up every time we can face this problem.
B. Trade management
1-Take profit calculation:
For the first trade my take profit is = to (ATR * multiplicator 1) changeable.
For the second trade TP = to (ATR * multiplicator 2) changeable.
For the third one TP = to (ATR * multiplicator 3) changeable.
2-Stop loss calculation:
Our stop loss is the same for the three trades and = to (ATR*multiplicator) changeable
When my first Take profit trigger, I need the EA to move the stop loss of the last 2 trades for break even point means to the opening price.
When my second trade Take profit trigger, I need the EA to move the stop loss of the last trade for the first take profit points of the first trade.
Looking forward to continuing the phase two of this project, to make the entry price automated also.
Thank you,
Tony Joubran
Beirut-Lebanon