Trading based on algorithm

Hi! I'm hiring a freelance to create me an EA/Script that can do the following:

1. Open two trades at once:

Buy at market price & SellStop 15pips (can be changed as variable) below the opened position (Buy). <--- Preferably with a keystroke. ;-)

2. Once the Sellstop is triggered, it straight away open a BuyStop at the previous Buy price.

3. Once the BuyStop is triggered, it again straight away open a new SellStop at the previous SellStop price. 

3. Repeat the process until a Take Profit event occured or if the volume size of orders exceed certain value.

Thanks in advance.