diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index e20a962..38c23e2 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -1022,6 +1022,19 @@ ORDER BY MIN(adx) DESC;
      * 20:05 - Reverted to Helius (works reliably)
    - **Critical:** NEVER use RPC provider without WebSocket subscription support for Drift Protocol trading
    - **This is definitive:** Helius only, no alternatives work reliably
+   
+   - **TECHNICAL NOTE (for future investigation):**
+     * Alchemy Growth plan (10,000 CU/s) DOES support WebSocket subscriptions according to official docs
+     * Supports up to 2,000 concurrent WebSocket connections
+     * All standard Solana RPC methods supported (getProgramAccounts, getMultipleAccounts, sendTransaction, etc.)
+     * No known Drift-Alchemy incompatibilities documented by Drift Labs
+     * Research source: Alchemy Solana docs + Drift Protocol documentation
+     * **Hypothesis:** accountSubscribe errors might be rate limit 429s (CUPS enforcement), not "method not found"
+     * **Potential issue:** Drift SDK may not handle Alchemy's rate limit pattern during initialization
+     * **Why it matters:** First trade works (subscriptions established) → subsequent trades fail (SDK in bad state from rate limit errors)
+     * **Pragmatic decision:** Helius works reliably NOW, theoretical investigation can wait
+     * **Future optimization:** Could implement WebSocket-specific retry logic, subscription batching, init delays
+     * **For now:** Helius free tier + 5s exponential backoff = production-ready solution
 
 2. **Prisma not generated in Docker:** Must run `npx prisma generate` in Dockerfile BEFORE `npm run build`