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Limit orders are filled at a specific price or better (for long better = lower, for short better = higher).
Portfolio Backtester works with all prices between Open, High, Low, Close of a bar, [[Intra-bar Price Movement Assumptions|assuming that all these prices are real]], since '''[[Bar Magnifier]] feature is not available for Portfolio Backtester'''.
Limit order execution behavior for backtesting can be modified in the '''Backtesting''' tab of '''Strategy Properties''' window. To open this window, make a '''right-click on "Strategy 1" ''' in Portfolio Tree and select '''Show Properties...'''.
There are 4 different variants:
# Chart resolution is '''not''' 1 tick and Bar Magnifier is not enabled. Backtesting Assumptions is set to '''Fill limit order when trade price goes beyond limit price by 3 points'''.<div style="background-color: #E5F6FF;">'''Example''': Generated order: sellshort limit @ 121; order is filled @ 121 if 124 price is between High and Low; order is not filled at all if there is not 124 price between High and Low of the bar.
Since '''MultiCharts 11''' it is possible to specify '''TIF''' (time in force) for '''Backtesting Assumptions''' in Portfolio. At the moment only 2 TIFs are available: '''GTC''' and '''DAY'''.To specify the TIF right-click on the strategy in '''Portfolio Tree''' and choose '''Show Properties'''. Then go to '''Backtesting''' tab and select '''Fill limit order when trade price goes beyond limit price by … points''', and then the selection of TIFs will be activated. [[Category:Portfolio BacktesterTrading]]
