With strategies, the open of the next candle is just a default placeholder. You can put whatever price you want based on how the strategy works. I think this is a little bit off topic though, we're talking about too many things at once.
I am still not really sure if you're trying to deliberately delay action for x number of minutes on purpose, or if you're attempting to avoid a perceived delay.
Deliberately, no time frame can see lower than itself, but you could work from a one minute chart, and extrapolate the five minute signals from every 5th bar. This way you could tell how many minutes have elapsed within a five minute period. That's the simple explanation anyway. I am probably making it sound much easier than it actually is.
If you're concerned that conditional orders will only trigger on the open of the next bar, like you might have assumed that strategies do, then you don't have to worry about that. They'll trigger immediately once the condition is true, aside from any latency of course. There's no delay until the next bar, or anything like that, unless it is specifically directed to do so.