Here is my current one with GBP/JPY
I play it with 0.01 lots since I think Monday. So for the week I have gained 200 pips. I now close the whole bunch and come Monday I just setup the next Grid.
Maybe I'll just increase the lot size a bit.
0.01 = $2
0.10 = $20
1.00 = $200
You get the picture.
First run it on demo to get a feel for it.