Polymarket.

Market microstructure analyzes the granular mechanisms through which buy and sell orders translate into recorded transaction prices. It encompasses exchange matching engine latency, tick sizes, order flow toxicity, hidden liquidity (iceberg orders), and the interplay between spot trading and derivatives venues.

Perpetual contracts lack fixed expiration dates. To tether the derivative price to the underlying spot index, long position holders pay periodic fees to short position holders when perpetual prices trade at a premium (positive funding rate). Excessively high funding rates signal overleveraged bullish sentiment vulnerable to long squeezes.

Open Interest represents the total cumulative nominal value of unsettled, active derivative contracts. When Open Interest climbs to record highs while spot price consolidates within a tight range, it indicates massive leverage buildup that inevitably resolves in an explosive directional breakout fueled by liquidations.

Major trading desks and automated arbitrage funds maintain cross-margined portfolios collateralized by broad baskets of assets. When a sharp selloff triggers liquidation in a leading asset like Bitcoin, risk models automatically offload altcoins and collateral positions, propagating selling pressure instantaneously across the entire ecosystem.