iClose, iHigh, iLow, iOpen provide the value of previous candle or current candle - page 2

 
Conor Mcnamara #:

Yes, especially when the bid-ask spread is high. Have you seen what a bid price can be compared to the current close price during news events with extremely high volume?

FYI, every single OHLC price is lagging, on every timeframe as well.  A 1 tick timeframe is actually going to give more accurate representation of the market than a 1 second timeframe, and this is why tick charts are valid and respected in the software

What you state is not correct : on a bid chart (Forex, CFD, etc...) the close price of the current candle is always the current bid.

If you have seen something, it's either a bug or because your platform can't follow all the prices update : it's a visual artifact.