diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index 2db5625..e53eea8 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -635,6 +635,15 @@ docs/COMMON_PITFALLS.md
 
 **Purpose:** Track exact minute-by-minute price movements for blocked signals to determine EXACTLY when TP1/TP2 would have been hit
 
+**CRITICAL: Data Contamination Discovery (Dec 5, 2025):**
+- **Problem:** All TradingView alerts (5min, 15min, 1H, 4H, Daily) were attached to OLD v9 version with different settings
+- **Impact:** 11,429 BlockedSignal records collected from wrong indicator parameters (confirmBars=0 instead of current v9)
+- **Solution:** Marked contaminated data with `blockReason='DATA_COLLECTION_OLD_V9_VERSION'`
+- **Exception:** 1-minute data (11,398 records) kept as `DATA_COLLECTION_ONLY` - not affected by alert version issue (pure market data sampling)
+- **SQL Filter:** Exclude old data: `WHERE blockReason != 'DATA_COLLECTION_OLD_V9_VERSION'`
+- **Fresh Start:** New signals from corrected alerts will use `blockReason='DATA_COLLECTION_ONLY'`
+- **Database State:** Old data preserved for historical reference, clearly marked to prevent analysis contamination
+
 **Critical Optimization (Dec 2, 2025):**
 - **Original Threshold:** 30 minutes (arbitrary, inefficient)
 - **User Insight:** "we have 1 minute data, so use it"
diff --git a/cluster/exploration.db b/cluster/exploration.db
index 284ab9a..e303153 100644
Binary files a/cluster/exploration.db and b/cluster/exploration.db differ