Simple EA

Hi, I need a simple EA writing as follows

order is placed manually by trader or is already open when expert is added - there could be several orders open - each order is to be addressed individually

2) EA closes half the position at XX Pips profit

3) EA modifies the the order to break even at XX pips profit 

4) EA does this for every order on the specified chart (i.e only picks up trades from GBPUSD) - there could be several orders and there could be several orders open on different forex pairs

place stop function, take half function and break even function can all be switched off by setting to zero on the options

Simple example:

first trade is manually placed at 1000 - stop is 20 pips at 980 , take profit is +50 pips at 1050, take half is +20 pips profit at 1020, move to break even is +30 pips at  1030

second trade is manually placed at 1010, stop is 20 pips at 980, take profit is 50 pips at 1060, take half is 20 pips at 1030, move to break even is +30 at 1040

third trade etc etc