These #'s may not be accurate. It's reading every single 'sell' transaction as a 'short' transaction. It's not distinguishing between the actual 'sells' from 'shorts'. To short a stock it needs to be marginable within that broker or that broker has a relationship with an institution that is willing to loan their shares to that broker (which usually carries a large interest rate to the loan). It's very uncommon for a broker to allow an ob./pk. stock to be marginable or to be held as collateral for margin. Point is, it's more likely that these transactions are 'sells', not 'shorts'.
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