When I scale in into trades on IB's TWS and i want to sell one of those batches, not the whole lot; how do i do that? Thing is everytime i scale, the total quantity of shares is shown with the total average. Let's say i buy 100 shares at 9 and then i scale another 100 at 10; total shares is 200 and the average is 9.5. The stock goes to 11 and I want to sell 100 shares, but i want to sell those which i bought at 10 not at 9. How do i do that on TWS?