TODO.md

Outlier Detection Filter Implementation

Approved Plan Steps

1. [x] Create src/logic/outlierFilter.ts

• Implement filterOutliers() with IQR method
• Add isOutlier() helper

2. [x] Update src/services/marketRate/types.ts

• Re-export filterOutliers

3. [x] Update ghsFetcher.ts

• Import filterOutliers
• Filter rateValues before calculateMedian

4. [x] Update kesFetcher.ts

• Import filterOutliers
• Filter in fetchFromBinance() and other price collection points

5. [x] Update ngnFetcher.ts

• Import filterOutliers
• Filter rateValues before calculateMedian

6. [x] Test changes

• Run npm test
• Manual test: import MarketRateService and call getRate('GHS')

7. [x] Complete

• attempt_completion