It is free charting s/w. So don't expect much from it. No point in getting mad about the poor quality. simply remove the VWAP thing. Then there is a fewer problem. There are good and bad things about IB. So go and benefit from the good things IB is providing. If there are no good things about IB, look for another broker right away. There are hundreds of brokers and tens of charting s/w providers to choose from. There are lagging problems even from the paid charting s/w.
To try and fix the issue, I've added both the Intraday VWAP and Moving VWAP. Doesn't help. Anyone know the difference between the two?
VWAP is intraday only...resets every day. Moving VWAP is a multi-day (I think you can designate how many) time frame. You could have googled this in 5 seconds.