I used to trade a NASDAQ Lev-II environment with accurate volume and all the bells and whistles. However, the crap fills, slippage, partial fills, delayed orders, wrongly routed orders etc. were becoming a real pain and even though I was making money (at last), I jumped ship to trade FX, for all the right reasons. But, so dependent had I become on these tools and data, I felt I was trading blind and decided to endure all that crap again and go back to trading the NAS, just because I had gotten so used to the information supply. It didn’t take too long on that final foray to realise what a dream FX is to trade compared with pretty much any other asset class. And I let go all the superficial data, including volume and stayed with FX.
Volume data for FX is pretty meaningless for a retail player. You might just as well ignore it where it is provided.
But for exchange traded assets where accurate volume data is available, would I put as much emphasis on it as I used to? Probably not. While useful generalisations can be made about what volume ‘means’ within the context of price action, it’s still just another layer or veneer on the underlying
The biggest issue for me is one of granularity. When you look at a bar, whatever timeframe, and it says 100,000 volume for that bar. That’s a piece of data. For the entire bar. And in the context of a down trend which has been seeing steady falls and volume of max 10,000 per bar and this current relatively high volume bar is an up bar, that’s potentially interesting. And there might be a tendency to attribute all or most of that volume to the bar being up and even go further to deciding THIS is the reversal bar.
But when, during that bar, did the volume hit? Was it spread out with even distribution or did it hit in just one go, or over just a few transactions. And how much of this volume was up volume and how much was down? The closing price of any bar is simply a snapshot of the last traded price at a given point in time. What if 90,000 of that bar’s 100,000 volume was selling it down to the low of the bar and the last 10,000 came in in dribs and drabs, but designed precisely to make it look like it had been bid up?
Even if you get down to tick data which takes all the issues of granularity out of the equation, unless you have something like Lev-II as well, you’re not going to know for sure if it’s genuine or spoof or a blind. And even Lev-II isn’t going to guarantee you that information anymore. There’s too much that goes on ‘darkly’ to make it anything other than a mug’s game for a non-pro.
There’s a chap on here (a few actually) that know shed loads more than me about Lev-II and use it profitably. But I suspect, if you drill them for it (LOL) they’ll admit they bring a lot more to their trading than volume or even Lev-II to make it a profitable enterprise.
I don’t imagine it’s all game-playing so yes, volume can be a useful indication within the context of price action. But I certainly no longer consider it an essential part of the toolbox.