Order flow data shows you why prices move in real time, while candlestick charts and price action only show what already happened. The speaker compares it to upgrading from a bow and arrow to a sniper rifle with thermal vision: order flow is the actual driver of price, not a lagging indicator.
Candlesticks are more of an indicator than order flows. You can be profitable with a normal price action strategy, even though it may be a little bit outdated. But would you rather start by learning the bow and arrow, or would you start by learning a sniper rifle with thermal vision? This is not indicators based on past data. This is literally a deeper layer of information because order flow is causing prices to move. So order flow stands to price action like price action stands to EMAs. It's what moves price.
