NeuroShell normally uses the open of the next bar as a default fill price. However, if your data source is supplying bid and ask prices, NeuroShell can use bid or ask of the current bar instead. This only applies to Second, Tick, Volume or Range bar charts and again, only applies to data sources that provide bid and ask prices.

By default, NeuroShell Trader 5.6 and greater uses bid/ask. If you would like to disable bid/ask trading and enable trading at the next open price instead, shut down NST, and browse to your c:\NeuroShell Trader 5 directory and open up the file named nstparam.ini file. It usually opens in Notepad by default. Change the nstparam.ini file value of BidAskEntryExit=True to BidAskEntryExit=False. Save the file and restart NeuroShell. You may need to rebacktest your trading strategies for the change to take effect.

By default, NeuroShell Trader 6.x does NOT use bid/ask. If you would like to enable it, shut down NST, and browse to your c:\NeuroShell Trader 6 directory and open up the file named nstparam.ini file. It usually opens in Notepad by default.

If you are using 6.2 Beta 6 or later, your nstparam.ini file will use a value of BidAskBacktestFill rather than BidAskEntryExit. If your file has BidAskBacktestFill=False in it, then set it to BidAskBacktestFill=True to enable the use of Bid/Ask, or if enabled and you wish to disable, change it to BidAskBacktestFill=False.

If you are using 6.2 Beta 5 or earlier, then your nstparam.ini file does NOT have BidAskBacktestFill in it. Instead look for BidAskEntryExit=False and set it to BidAskEntryExit=True to enable or if already enabled and you wish to disable, change it to BidAskEntryExit=False.

Once you have made the desired changes, save the file and restart NeuroShell. You may need to rebacktest your trading strategies for the change to take effect.