Core Requirements:

1. Monitor cNFT trades across all major Solana NFT marketplaces
   • Tensor
   • Magic Eden
   • Others as needed
2. Filter for DePredict collections
   • Only track cNFTs from their markets
   • Identify market_id, outcome_side, shares from metadata
3. Calculate implied probabilities
   • Extract sale price from transaction
   • Divide by shares to get per-share price
   • That's your implied probability
4. Aggregate and normalize
   • Collect all recent trades (last hour? last day? configurable)
   • Calculate weighted average
   • Ensure YES% + NO% = 100%
5. Publish data feed
   • Store in database
   • Expose via API
   • Optionally push to oracle (Switchboard/Chainlink)