OnBarClose?

[AntiMatter]

with
CalculateOnBarClose = false;

protected override void OnBarUpdate()
{

Print( Time[0].Second);

always gives "0", whether in RealTime or MktReplay

[NinjaTrader_Lance]

Sorry I forgot to mention. You will only be able to get the seconds when using a tick based bar type. You can Add() an additional series or run the script on a tick based chart.