Modify existing Expert Advisor

I have a new idea that i would like to code. 

I  have existing EA attached that i would like to add a 2nd trading module into.

Called - Retracement Module.

Coding logic: is to place an order if price retraces 75% or 68% or 50%  (3 options in the EA) of the body of the candle that the attached EA is calculating to trade on 1 hour breakout. Rule is only applied if the 1st trade is active.

Features:

True / False

Risk per trade: 0.01 (equals 1 percent risk)

Reward (1:1, 1:1.5, 1:2, 1:3, 1:4, 1:5, 1:6)

Stop loss at high/low of Candle (Function in existing attached EA / Same as code in attached EA, i.e stop loss should be calculated the same as 1st order.)

(Order will be placed in the EA if Retracement Module is set to TRUE) Only on the 1st order in the original EA logic.

Trades will only be taken on Monday Tuesday or a Wednesday.