Quote from kut2k2:
That sounds like just assuming some random strategy as a standard.
I'd use a choppiness indicator. When the choppiness value is low, you can make money with trend following. When the choppiness value is high, you can make money with rtm strategies. So the iffy part is at the halfway mark, which either means equal parts trend and chop or more likely randomness, which is untradeable.
So take the choppiness reading of your 5000 1-minute data and the choppiness reading of your 5000 eod data. Whichever one is farther from the halfway point is the more tradeable timeframe.
You should probably use something better than the Driess Choppiness Index, which is pretty kludgey IMO.