BTC options expiring 14SEP26, 4 days out, with the forward at $77,955. Open interest is $3M in calls and $1M in puts, put/call 0.51, and max pain is $78,000. At-the-money implied volatility is 35.6%. Where a strike is listed on both venues the cheaper ask and richer bid are visible side by side; the arb scanner flags any gap that exceeds fees. Strikes shown are within 60% of the forward. All BTC expiries.