Bid/Asked or Last used?

[cgeorgan]

Hi-

When the bid/ask prices are available, are these used in calculation of historical market trades, or is "last" used +/- whatever slippage has been specified in the backtest?

Furthermore, is bid/ask used for market trades when live bid/ask data is available and running in simulation mode?

[NinjaTrader_Bertrand]

Hi cgeorgan, yes correct the last + - slippage would be used here - bid / ask could be used if your strategy is specifically coded to take advantage of those add()ed series to execute to them.

You execute against the live bid / ask on the simulator then with your strategy.