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 [⚓ Anchor](./finance/betting-market/anchor) [💫 Quasar](./finance/betting-market/quasar)
 
+🎬 Video: [How to build a PolyMarket/Kalshi style betting market on Solana](https://www.youtube.com/watch?v=jE3-IA1FBs0)
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 ### Perpetual Futures
 
 A perpetual futures exchange: a venue for making leveraged bets on an asset's price without ever owning the asset. Traders post collateral and open a **long** (betting the price rises) or **short** (betting it falls) sized up to several times their collateral; their profit or loss tracks the price move and is paid in the collateral token. Rather than matching buyers to sellers, every trade is against a shared **liquidity pool** that other users fund and that is the counterparty to all of it: the pool pays winners and keeps losers' collateral, and its providers earn the trading and funding fees in return. The price comes from an oracle, positions accrue a funding fee over time, and anyone can **liquidate** a position whose collateral can no longer cover its loss. This is the design behind venues like Jupiter Perpetuals and GMX.