The technology we use to identify 1-Hour trends works just as well with 4-hour, daily, or even weekly time frames. The problem with those longer time frames is they have large potential drawdowns, too large for most traders. Plus, the trades take a long time (days, weeks, or months) to complete. We find that most traders aren't that patient.
1-Hour trends give the greatest potential profits with the drawdowns and time frames most traders can handle, so 1-Hour trends are the way we go.