DOS is a mean-reversal strategy that trades against the previous candle direction as long as it has body greater than the PrevRange paremeter.
Best results are obtained in GBP and AUD pairs on daily charts , but of course you can experiment with other assets and timeframes.
Strategy parameters include starting and ending dates, the previous candle range (raw value), the Stop Loss (SL, in pips, 200 = 20 pips) and the Take Profit (TP, in pips too).