A computer implemented method and system for executing block trades for a security includes steps or devices for receiving a block trade request, at a computer system. The block request includes data representing a quantity of shares of the security to be traded over a period of time. The computer system divides the period of time into a plurality of time bins. A computer system, for the received block trade request, computes, for each time bin, a number of shares to be traded as a trading target based on at least historical trading volumes using predictive analysis. For a first time bin, a computer system generates executable trade orders for a number of shares to be traded that is substantially equal to the trading target for the first time bin. A computer system executes at least a portion of the executable trade orders in a trade forum within each time bin in the future.