It includes a lot of factors involved, you have to combine technical analysis + fundamental analysis and follow daily market-related events.
More simply, I usually follow the bitcoin price, market capitalization and besides I regularly follow the news on twitter, on twitter always update the fastest of the market. And new trends in the market are often communicated thereby KOLs. Recently, I have a feeling the meme trend is coming back and if this is true then we will have a bull season this April.