BTC: Is 78,855 the right buy at the ascending channel?Bitcoin / TetherUS PERPETUAL CONTRACTBINANCE:BTCUSDT.Pkiv1nI viewed the original setup as a straightforward BTC long off the ascending-channel bottom, with 78,855 entry, 81,395 TP, and 77,520 SL. Once I checked the nearby structure, I found hidden risk and optimized the levels that needed changing. At 78,855, the original entry is 23.2 points above 1h support 78,831.8 and 51.6 above the nearest unmitigated bullish OB, 78,720–78,803.4, risking an early fill. I set 78,803.4 at the OB upper boundary, valid for the 0.1 price tick size and reachable with 15m down, 4h/1h up. Original TP 81,395 must clear 79,555.5 resistance, bearish FVG 80,268–80,386.6, bearish OB 80,710.7–81,150, 81,270.5 resistance and 81,309.8 VAH with 15m down. I set optimized TP 79,538.1, 17.4 below resistance, ~0.1 15m ATR after tick rounding, avoiding full local reversal. Original SL 77,520 is below 77,600 structural low; its 80-point buffer is under the 173.8 15m ATR yet far from entry thesis. I set optimized SL 78,546.2 one 15m ATR below the bullish OB lower boundary, 78,720, keeping a non-zero POI-invalidation buffer with less capital at risk. I improved R from 1:1.9 in the original setup to 1:2.86 in the optimized setup.