Powell gives news about inflation and CPI data most often ones in a month, so I'm not sure if that will be enough for you to be scalping and be making money from trading as you think. Put in some other metrics apart from Powell speech, like when Microstrategy but more Bitcoin to their wallet, this news usually boost the price of Bitcoin, follow the trend on Elon and his crypto events, people are now bullish on his campaign and any activity he do about Bitcoin moves the price.

You may also bank of things like important event like some days ago, people expected CZ to be free from prison and immediately the news broke, BNB and Bitcoin fly to $65k, buying Bitcoin some days before such news broke can help you make profit, you can also put US election on watch, it's a big day everyone is waiting to see Trump becomes the president of that country, if things go as they wish which is possible, Bitcoin will pump and you can make profits with such news.