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Date/Time: Sat, 05 Jul 2025 12:43:42 +0000



[User Discussion] - Bad rounding in Trade Activity Log

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[2021-03-16 05:20:35]
User816220 - Posts: 80
I use the Trade Activity Log to track my own P/L vs my broker. Today, for the first time, there was a discrepancy between the two.

Looking at the Trade Activity Log, SC version 2238 appears to have done some bad rounding, e.g.:

Long 1 F.US.RTYM21 / Enter@2341.0 / Exit@2340.4 for a loss of 6 ticks

shows a loss of -29.99 instead of -30.

The log shows three F.US.RTYM21 trades where the P/L (without commission) was either xx.99 or xx.01. Finally, there was a trade where the P/L was xx.00 but it added a loss of xx.01 to the cumulative P/L.
Private File
[2021-03-19 20:45:59]
User816220 - Posts: 80
Came across the answer while browsing through the documentation

Trade Activity Log: Profit/Loss Calculation Rounding Error

Profit/Loss calculations in Sierra Chart which are displayed as a Currency Value are done using floating-point numbers.

Inherently there is some imprecision with these types of calculations which can lead to small .01 display inaccuracies.

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