Technical analysis (TA) requires some price history, such as a buy and sell chart then we will see (MA) Moving Average from some price history that occurred from last year or day, there we can draw a line to get a prediction, where will the next candle go and whether the price will start to rise or fall and has reached the price support that we analyze.
All of that is just analysis and prediction, but we always take a picture of the past to see the future, even though no one knows what the future will be but at least we have made an analysis