I am getting data spikes while working with SPY, intraday with streaming on. Not sure if this would occur with other symbols but is consistent with SPY.

Attached are two pics with a spike on the last bar of the day and then without it after refresh (GO).

If I don't refresh then spikes would be all over the charts seemingly random.

It doesn't seem reasonable this is an IQFeed issue?

One thing about ticks, you get them all, as reported. You can filter spikes by percentage in Wealth-Lab using Preferences > Streaming > Bad Tick Filter. Anything less than a 1.4% filter would have taken care of that one.

If it was removed from the historical data, it must have been a busted trade or something of the sort. You can chase down ticks and their trade condition codes yourself using the tools provided by IQFeed.

p.s. Getting a bad tick here and there these days is nothing. Did you see what streaming data looked liked 15 or 20 years ago? Today it's pure joy!

Ok thanks