Thanks Guiom and JCL, the plan is coming together. I will attempt to code it and see how I go.

By the way 55/20 is the most profitable all round settings for the donch channels. The add ons I have found to be profitable are every time the 55 is broken and the donch channel has been flat for at least 3 bars although I think I will probably have to look into some sort of ATR entry for 3 or 4 entries and then stop adding on, very much like the original turtle rules.