A bar that is marked up on a wide spread during the period—pushing above the previous bar's high—but then collapses to close at or near its low, giving it a telegraph-pole appearance. Volume can be either high (supply overwhelmed demand) or low (the mark-up was on thin air with no demand to support it). True up-thrusts appear when there is weakness in the background—high-volume narrow-spread up-bars closing in the middle, no-demand bars, or visible distribution—and are designed to trap breakout buyers and trigger buy-stops before prices reverse lower. Expect lower prices; further no-demand bars confirm.