Market rythm / EA based on MA worked till the 2008/10/30 and then ...

 

Hi,

Can someone explain me why an EA works perfectly on 100 trades with the regularity we are all looking for and then, at a potentially strategic limit, stops working.

example : take the standart EA "moving average 12/6" proposed in the basic configuration of MT4, use it on M1 on EUR/USD,

you will obtain +820 profit on +/- 100 trades on the between oct 28th and 30th

take the same parameters on the day after (oct 31st), you obtain -520 in 56 trades with the same regularity of trades.

the limit between this two situations is 2008 oct 31 at 00 : 00 !

I tested this situation with personnal EA based on the same logic of moving averaged used in standard and in reversal. and I find the same limit.

The market has had clearly a change of rythm.

If some has an explaination, he is welcome.

Regards