Hi Ken,
I'm not surprised that it works in other time frames, although I think that 5" is too fast. Sometimes, I look at the 30" chart to confirm a trading signal, using prophet.net. If I were not trading the 60" chart, I would go to the daily chart, using the same methodology.
I've noticed that the RSI-5 is identical to the Fast Stochastic, and gives a very timely trading signal, if we are in a trading range situation, as is the case currently. I am still concerned as to what happens when we abruptly begin a new trend, and I will see it as it happens. Too often, I am slow to react.
Chico