Results different real time vs historical

[several]

I'm using a simple script check to determine engulfing bars. Onpricechange.

I check if the current bar is higher & lower than the previous and I also check which time the bar ticked higher and ticked lower using a DateTime Variable:

Time_TickLower = (Time[0]);
Time_TickHigher = (Time[0]);

In realtime it works perfectly, I get this result:

ENGULFER: Bar 7399
TickHigher = 09/08/2024 16:25:30 <---
TickLower = 09/08/2024 16:25:46 <---
Time 16:25:46.6320000

But when loaded historically, the exact same bar shows as this:

ENGULFER: Bar 7399
TickHigher = 09/08/2024 16:25:46 <---
TickLower = 09/08/2024 16:25:46. <---
Time 16:25:46.6320000

Note how the TickHigher & TickLower time in realtime is 16 seconds apart, but hostircally it's the same time. How can I fix this?

I need to know which occurred first, the tick higher or tick lower in order to be a draw the correct object.

[NinjaTrader_Jesse]

Hello several,

When using a backtest the script is always run OnBarClose, as you use OnPriceChange in realtime that will cause differences if you are doing anything intrabar. You can try using tick replay to see if that brings the results closer, you would otherwise need to use the playback connection to simulate OnPriceChange.

[several]

Hey, I'm testing via Market Replay, these are the results from the output there.

If I put the playhead before these bars and play, it works.

If I move the playhead just after the bars, and they are loaded historically, it doesn't work.

[NinjaTrader_Jesse]

Hello several,

Right, that is the same situation. Historical bars are calculated OnBarClose. To simulate OnPriceChange you need to run the script in realtime so putting it before the time and playing through it would be correct.

[several]

ah ok understood thanks.