> ## Documentation Index
> Fetch the complete documentation index at: https://docs.activeviam.com/llms.txt
> Use this file to discover all available pages before exploring further.

# FRTBCombinedCube context values

| Context value           | Description                                                                                                                                                                                             | Example          |
| ----------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------- |
| **PLALookback**         | Number of business days to look back when calculating the Spearman Correlation and KS test metrics for PLA Tests. <br />This may also be expressed as a period, to look back a number of calendar days. | “1M”, “3M”, “1Y” |
| **BackTestingLookback** | Number of business days to look back when counting the number of exceptions in the VaR backtesting. <br />This may also be expressed as a period, to look back a number of calendar days.               | “1M”, “3M”, “1Y” |