The best way to get a handle on buy/sell is to look at the trend of the chart.
Look at freerealtime.com and you can get time&sales data.....Look at that and you can see the trends. How many shares traded at a given price before the price moved and which way the price moved. From that you can infer buy and sell volume.
Many people have trouble with the idea that such a simple question as how many shares were buys and how many were sells doesn't have a clear cut answer. That is part of learning how to deal with the market. There is a lot less hard information available than it appears.
Sort of like trying to balance on chair that is on mud. Every time you shift your weight one of the chair legs sinks a bit further into the mud.
There is a huge amount of ambiguity in dealing with the market.
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