Create an automatic trading robot EA based on an existing indicator

I would like to develope an automatic Trading EA using an existing trend indicator I bought at the market place via mql5, this EA will be used on Metatrader 4 platform.

The trend indicator I am using shows growing trend in green and declining trend in red, when trend changes, there normally is a signal (this needs to be verified).

I need the EA to have the following functions:

1. Ability to set lot size.
2. when the trend changes, depending on the direction there will be 1-3 orders opened using market price:

          Ability to set stop loss, take profit and individual lot size for 1-3 orders (called order 1, order 2, order 3) , these three orders need to be set separately for lot size, SL, TP, if left blank, that order will not open (for example if the user only filled in information for 2 orders, only 2 orders will open)

3. ability to close all orders at next trend change, there need to be a setting in the 1-3 orders above mentioned which is called 'close at next trend reversal', once this is ticked, it will override SL and TP. this has priority over SL and TP.

Please contact me if you can make it happen.

Would like to have the EA ready asap.