Once the RSI crosses 30 on the 1-hour chart, the following 2-3 days should see the MACD trend continue downwards or be flat. If it starts to go higher, the conditions are invalidated.
If there's a major event happening like an epidemic and the markets will likely crash like from February to March 2020, these rules don't apply. During that period, the RSI never went below 50, so you would have missed out on big gains!