I'm going through the workshops in the manual and for fun was running the random martingale system in workshop 8_3, but my test results show none of the tell-tale martingale effect - i.e. the ragged P/L line. Mine look more like the attached screen shot. Why would this be?

That's not your fault, its ours - sorry for that. The included workshop 8 scripts were actually for Zorro 1.10. We'll upload Zorro 1.12 versions next week.

Ok, thanks. BTW, I assume the robot mentioned in the workshop is Forex Growth Bot. Out of curiosity I looked at FGB's myfxbook page to look at it's trades. It doesn't seem to have fixed limits, but is likely using a 5-min chart as all entries and exits are on the 5-min mark. And the list of trades doesn't show a significant increase in lot sizes or position sizes after a loss, so I'd be curious how that would work in light of the discussions in workshop 8.

FGB works on 15min timeframe. It does not increase the lot sizes after a loss, but the number of trades are significant higher in drawdown phases. So this is a hidden way to "increase" the lot sizes.

ahh, interesting.

FYI, the workshop 8 scripts included in 1.12 were missing the TICKS flag.