1. A-S reservation price now uses gamma*500000 scaling.
Before: bash.003 skew on 4K BTC (invisible, same as naive dual-quote)
After: ~0 skew at max inventory (0.05% of mid — enough to suppress one side)
2. Mean Reversion: 20-tick → 60-tick window, threshold 1.0σ → 0.5σ.
20 seconds of 1s ticks is noise, not mean-reverting.
60 seconds captures real short-term reversion dynamics.
Fill attribution verified: BTC sizes differ by 50 μBTC, ETH by 0.0025 — all above matching tolerance.
Orderbook null guards present — no crash on failed fetch.
The AS optimal spread formula gives absurd spreads at crypto scale.
Real market makers quote at the MARKET spread (best bid/ask) and use
AS to decide WHEN to quote based on inventory-adjusted fair value:
r = s - q * gamma * sigma^2 * tau
If r < best_bid (long-biased) → stop quoting bid
If r > best_ask (short-biased) → stop quoting ask
If circuit breaker active → pause both sides
Decoupled: spread is market-driven, inventory skew is AS-driven.
ramseshk