EA that place pending trading orders

Hello there ,

i want to make EA that place orders depending on the free margin in the account . the orders gonna be placed by priced area .

I attached some pictures to explain more .

there should be an option to decide the % of free margin to use

so if the account leverage is 1:500

the orders going to fill the specific area with orders so if the price goes farther then that area with 1 pip i think the account going to get MC = account blown

* am not sure about the  lot that going to be used , If the area is too small i don't think 0.01 going to be enough so maybe you can make the lot decided by the EA regarding to the area and the free margin *

and the EA going to have an options to :

1- enter the start price area

2-enter the last price area

3-set the margin risk that i want

if there is something that is not clear please let me know .

Good luck .