Any time frame is fine. You could put some time filters in if you wanted to encapsulate only certain periods.
1) deploy the EA just before a news release and TP at a point of support / resistance.
2) deploy the EA on a penetration of the 2 or 4 HR bollinger bands
3) deploy the EA in a tight range setting prior to breakout with some type of volatility filter.......
There is tons that could be done with this entry method. Other EAs could call up this EA as a executing function, ect.............