Does it matter whether bid or ask volume is higher for a given bar on a chart? I know some people say volume is useful... does it matter if it's bid or ask volume? Or does bid vs. ask just really only tell which side the MM felt like hitting. In other words, say you've got price and volume on your chart and there's a steady uptrend and then you see the most recent bar has like 10 times as much volume as the rest. That could be significant. Ok now you're looking at that same chart but this time with bid/ask volume. You see there's that same huge volume spike but it's 90% bid volume. Same thing except it's 90% ask volume. Same thing except it's 50/50 bid/ask volume. Do you care? How would your interpretation of price action change in these cases?