look back period over month boundary

[binwang2]

look back period over month and year boundary

I am looking for indexing bars from 4:00 PM at previous day to 1:00 AM today. I have no problem is doing it within a month. But I cannot find an automatic way to go over month boundary and year boundary by using DateTime methods/functions. Any suggestions?

DateTime EndTime = new DateTime(Time[0].Year, Time[0].Month, Time[0].Day, 1, 00, 00);

DateTime StartTime = new DateTime(Time[0].Year, Time[0].Month, Time[0].Day-1, Time[0].Hour+15, 00, 00);

int LookBack = GetBar(StartTime) - GetBar(EndTime);

[NinjaTrader_JoshP]

binwang2,

You need to create your own logic to address month changes and year changes. You have to check the day if its 1 then you can't just subtract 1 from it. You'll have to switch it down to the prior day.

Instead of doing it like this you can try this.

DateTime someVariable = Time[0].AddDays(-1);

Then you take someVariable and then make the time adjustments you wanted and then pass that into your GetBar().