To Cameron398

Here are my replies:
"In your years of trying to crack a system what was your longest winning streak? More specifically, were you able to return a profit for a period of time and if so for how long?"

One method returned a profit on turnover of appoximately 25% over about 10 months and 280 bets. It then fell in a complete hole and made a whopping 60% loss on turnover over around the next 200 bets. I follow the method now just to get the horses and use full form analysis to eliminate most of the system's horses.

"And by the way - what do you think is the minimum number of sample races one should start to rely on?"

For a racing system based on simple rules and not proper form analysis eg, weights, times, class, fitness, barriers, jockeys, video study, etc. etc. - none.

If you are using proper form analysis etc. then more important than whether you are making a profit over any period is how your selections are going in the races. If you are showing a loss and are backing selections at generous odds - whatever that is!! - but there are plenty of valid reasons like bad luck in a lot of races, or plenty of good runs but something else just nabs your horse/s then there is nothing to worry about. Things will turn around.