Truly at times when the market is green it can be profitable as well but the overall sentiment of the market will have to be bullish thus the trader will enter the market in pullbacks or reversal, however this can be achieved with knowledge in Price Action with the aid of candlestick patterns.
Some traders often invest when they say that the market is bullish which I think is wrong, they need to analyze patterns, they need to learn candlestick and some other strategies that can help them to fully understand the market and let them not suffer to much loss. Because sometimes we can encounter fake pump as well, so we need to be extra careful in these things.