Switch between systems

[David Pyle <dpevergreen@xxxxxxxxx>]

In my system, I switch between two systems which compete for the next trade. I am using as a switch the sum of the p/l of the last x bars. The idea being that whichever system is in sync (more profitable) with the market, keeps trading.
 
There must be a better way to switch between systems than summing the last x bars.
 
Suggestions to try?
 
Dave Pyle