I try to make the final decision to invest or not using the daily, but I mainly use the hourly to decide where to enter when the daily's looking promising. (You get one candle of information on the daily but 8 on the hourly!)
Retail traders with under $25k cash balance are allowed three day trades in a rolling 5 business days period. So you can see a reversal situation or possible bull trend forming on the daily, watch a few hourly candles for confirmation, and have a pretty safe buy assuming your indicators are sending clear buy signals with a panic sell if needed.
If you're watching hourly MACD, you might watch for an entry once you get three or four dark ticks after a long run of bright reds, or wait for the crossover to confirm that it's not going to bounce back down off the moving average line. When a new trend is forming, the shorter term charts (eg hourly, 4h) will do a MACD crossover and send buy signals before the longer term charts (eg daily, monthly) do. Usually you will see agreement down to about the 1h chart, but lower than that the trends fluctuate too much to be reliable.
Most likely Alligator will NOT be signalling to buy until MACD finishes a crossover, but pick your favorite tools to watch for momentum swings to give yourself early warning something's coming up. :)
When I'm buying higher in a run, or a dip after a pullback, I'll go as close as the minute charts and watch my triple-stacked MACD for momentum. Some of this is gambling and gut feel and it's very possible to get burned. A safer bet is to check for momentum swings happening on the 30m or 15m chart, but still consider the hourly for your actual entry. It's a trade off between getting in low enough to help you get out without losses if the run falters, and actually knowing there is indeed a viable run starting! It's not worth wasting time on minute runs, ideally you find the runs that last for several hours.
