Trust factor is a new parameter that helps you to compare how the "forward" test results match the backtest results. The closer they are to backtest the more we can trust such system.
Why there can be the differences between backtest and forwardtest?
Because the backtest is usually done on the closing odds while the forwardtest signals are usually locked with odds 3-4 hours before the game starts. In many cases it does not matter but for some systems such difference result in worse forward test than backtest. Trust factor will help us identify the systems we can trust more with the forward live test. The trust factor has nothing to do with how profitable the system is in terms of $.
ROI (Return on investment) is a parameter that helps you to measure efficiency of an investment or a series of investments.
ROI is the relation of the investment's profit to the cost of investment.
Lager ROI is better.
Avg Dev (Average Square Deviation) is a statistical criterion, which shows how the real profit values differ from the expected.
The higher the value, the more jumps and irregularities in the graph of profit.
Smaller Avg Dev is better.