date time question

[td_910]

Hi,

I'd like to try to get volume of the same bar of yesterday's session using this piece of code:

TimeSpan oneday = new TimeSpan(24, 00, 00);

Print("\n" + Time[0].ToString());
int barsAgo1 = Bars.GetBar(Time[0].Subtract(oneday));
Print(Time[barsAgo1].ToString() +" " + Volume[barsAgo1].ToString());


the output, that gets produced puzzles me a bit. It's the volume of the bar, but two weeks ago.

13/04/2020 18:35:00
30/03/2020 18:35:00 11201

13/04/2020 18:40:00
30/03/2020 18:40:00 8834

13/04/2020 18:45:00
30/03/2020 18:45:00 6992

Any ideas, what is wrong?

Many thanks.

Thomas

[MojoJojo]

My guess would be

int barsAgo1 = CurrentBar - Bars.GetBar(Time[0].Subtract(oneday));

[NinjaTrader_Kate]

Hello td_910,

Thank you for your patience.

MojoJojo is right on the money here, you need to subtract the bar index of the bar you want from the bar index of the current bar to get its BarsAgo value to be used in getting the time and volume.

Here's how I'd do this rather than setting up a new TimeSpan, although that works as well:

            DateTime onedayago = Time[0].AddDays(-1);
            Print("\n" + Time[0].ToString() + " " + Volume[0].ToString()); 
            int barsAgo1 = CurrentBar - Bars.GetBar(onedayago);
            Print(Time[barsAgo1].ToString() +" " + Volume[barsAgo1].ToString());

Please let us know if we may be of further assistance to you.

[td_910]

Thanks for that. I must have been blind