Remove deprecated rbar_ok filter when switching to t > 2 filter

[alejandroll10]

Description

When switching to the t > 2 filter for signal selection, the old rbar_ok filter should be removed from the codebase as it will no longer be needed.

Context

The codebase currently uses an rbar_ok filter defined in 1_Download_and_Clean.R:135 that filters signals based on rbar > 0.15. This filter is used in multiple places:

• 3c_DataCounts.R: Lines 12, 32, 94, 129-140 for filtering signals
• 1_Download_and_Clean.R: Line 135-136 for defining the filter

With the adoption of the t > 2 filter (as seen in 4c1_ResearchVsDMprep.R:99 and 4c3_ResearchVsAcctVsTicker.R), the rbar_ok filter becomes redundant.

Tasks

• Remove rbar_ok filter definition from 1_Download_and_Clean.R
• Update all filtering logic in 3c_DataCounts.R to use t > 2 filter instead
• Update any dependent analyses that rely on rbar_ok
• Verify that all signal selection uses consistent t > 2 threshold
• Update documentation to reflect the new filtering approach

Files to Update

• 1_Download_and_Clean.R
• 3c_DataCounts.R
• Any other files using rbar_ok filter

Additional Notes

This change is part of the transition to using statistical significance (t > 2) as the primary filter for signal selection, which is more robust than the previous rbar threshold approach.