I've researched this information for a few days and prototyped a program to calculate it, but I find my results very different from those reported from trading platforms. I wonder if I can get some help understand why. My method: * Download 1 minute intraday data for a symbol * In the minute, if close > open, then the total flow ( mid_price * volume ) counts towards income. Otherwise it counts against outflow. * Summing the whole day up to get the total inflow / outflow. Apparently, it is quite different from what's available from other platforms. My questions are: * One minute is a pretty coarse granularity, would I get much better results by using second by second data? * Or I have to get the whole list of trades in order to get an acceptable results? (That is, even second by second data won't suffice.) * Or is there something fundamentally wrong in my approach? Thanks and appreciate the help.
The truth is - nobody knows in stocks. Yet, almost everyone pretends like they do. It's all guessing. Val
Based on my experience in the market, I can say that no one knows what will happen in the market. It is all guesswork that we all do. Some of us become successful in it while many fail.