Hi fifi743, thanks for the code modifications. Whilst I find it easy to understand using Value X and Y for an Oscillator’s threshold entries/exits, I’m not clear what this system is optimising? Could you please explain the Period 7 and Period 14 and how they’re being optimised in relation to the “once Value Y = 6”? Why is the Slow Period set to 6 but the Fast Period allowed to be optimised? Could you also please explain the buy and sell conditions: If c1 (the average of valuex) crosses over c2 (the average of valuex)? Thanks again, Bard.