Write a code to execute trades when SL is hit

I have an EA that open trades when my entry conditions are met. It usually executes one trade per day. I'd like to add an option to be able to execute more trades in the same direction of the initial trade when the SL is hit. 

It needs to add positions every time the SL is reached until whether 

1. TP is hit, or
2. 2. Maximum number of trades is reached.

Lot size: add the losing position to the next position (for example, if the first position lose 200$, you add the 200$, to the profit of the 2nd posn and etc.) See the profits and losses written in yellow in the image.

SL and TP: every added position will need to have the same SL and TP distance.

Input needed: Maximum number of trades

It is important that the code take into consideration that it can have two or more trades open at the same time for the same symbol.

I can provide the EA I have written if you need it.