Hi FRPEA,
The last couple of trading days have been a definite rollercoaster; lots of fast money on Monday that was more than given back the day after.
Perhaps S1 and S2 might benefit from some kind of volatility or trending filter that prevents them from running when a pair's volatility is too high or its direction is too strong? Alternately, do they have existing mechanisms to safe guard against such conditions? Of course, any such filter would only make sense if born out/verified as useful in tick backtests with an emphasis on the performance of more recent years.