what is the property of current bar's close time?

[leontancfa]

solved. thanks.

[NinjaTrader_Josh]

Not sure what you mean. Time[0] gives you the timestamp of the bar which is the closing timestamp of that bar when using time intervals.

[NinjaTrader_Austin]

To build on what Josh said, a solution to find a bar's closing time would be to use Time[0] and add the time from BarsPeriod.Value if BarsPeriod.Id == PeriodType.Minute/some other time based period.

// all the following code is untested, but should show the general idea.
DateTime timeOfInterest = Time[0]

// set timeOfInterest to the time of the current bar + the period of  the chart
timeOfInterest = Time[0].AddMinutes(BarsPeriod.Value);