Perp DEX cost invariance: all-in bps at $1M vs $1k, live slope ranked

Gains posts the lowest cost slope ($1m / $1k) at 1.000x (p50, 24h) on Perp DEX cost invariance: all-in bps at $1M vs $1k, live slope ranked. Ratio of all-in opening cost at $1,000,000 vs $1,000 notional, per venue per asset. A venue with flat cost at every size scores 1.00. A deeper book scores closer to 1.00 than a thin one. Oracle-priced venues (no orderbook to walk) always score 1.00 by construction.