Optimize over time interval

Hi,
   Optimization over user defined parameters in Multicharts is great and allow us to quickly find what combination of parameters is the best. However, most traders should have noticed that changing time interval often gives completely different backtesting results. It is not rare to see a bad system in a specific time interval getting very good in another one.
   For these reasons, I'd like to see that kind of optimization available in Multicharts. Not only time interval should be considered but also others like 'tick', 'range' and so on.
   I believe most traders using backtesting and optimization would use this feature.