If I am reading/interpreting the numbers correctly (there is a good chance I'm not and this is complete horseshit - I'd appreciate someone telling me)... I take the daily short count and double it because to cancel the short out you need to buy back in later. So I subtract that doubled number from the total volume and I get the net long shares that were bought over the 4 days... 769,567. If the short guy(s) bought every one of those net shares, they'd still be in the hole about 100K shares going in to yesterday and today.