I usually use the (Bid-Ask) Midpoint when charting futures with IB's TWS charts as during times with low trading activity, the bid/ask moves around but there are not many actual trades. Thus, I consider the chart of the Midpoint a more accurate representation of price most of the time.
As I haven't found this option yet, is there a way to switch the displayed price from Trades to Midpoint in AmiBroker? Thanks in advance!