When adding an instrument for a OnBarUpdate, does the MarketDataType (Bid,Ask,Last) apply to PeriodType.Tick? It is a parameter option, but I am wondering if it is ignored for PeriodType.Tick.
I ask, as some price sources consider a tick to be any update regardless of Bid,Ask, Last, etc. changes.
Thus, does PeriodType.Tick with MarketDataType.Bid give ticks caused by changes in Bid only?
Thank you for your time.
Number1
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Nevermind, not adding the parameter causes a compiler error, so I must assume it does distinguish ticks with MarketDataType. I assume MarketDataType.Bid ticks are bid price changes only and not bidsize? Sorry to bother. Thanks

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