OrderFlow VWAP BarsAgo Error

[Parmenides48]

hello,
I try to use VWAP in my strategy.
But I don´t know where is the mistake.
when I run the strategy appears an error:
Strategy 'myVWBSAEK': Error on calling 'OnBarUpdate' method on bar -1: You are accessing an index with a value that is invalid since it is out-of-range. I.E. accessing a series [barsAgo] with a value of 5 when there are only 4 bars on the chart.

[NinjaTrader_ChrisL]

Hello, thanks for writing in.

You should run the code in the primary series only, and also make sure there are bars in both the primary and secondary series:

        protected override void OnBarUpdate()
        {
            if (BarsInProgress != 0)
                return;
            if(CurrentBars[0] < 400 || CurrentBars[1] < 400)
                return;​

[Parmenides48]

solved, thanks

[Parmenides48]

Another question:
Is possible to calculate VWAP onBarClose and avoid to use a a secondary bars series using ticks.?

[NinjaTrader_ChrisL]

Hi, The only way to use the OrderFlow VWAP is to use it with a 1 tick series, unfortunately, this is the only way it can be used.