Full round-tripper

A full round-tripper is a trade that went into profit, sometimes substantial profit, and then reversed all the way back down to breakeven or into a loss before the trader closed it out. The name comes from the price making a "round trip" (up and then back down, or down and then back up for a short trade), which leaves the trader worse off than if they had simply taken the gain when it was there.

It happens because the trader had no plan, or had a plan but did not follow it, for locking in unrealized profit. Unrealized profit is the gain shown on an open position before it is actually closed; it is not real money until the trade is exited. Without a trailing stop, a partial take-profit, or a mental rule to move the stop-loss order up as price moves favorably, an open position can drift back through all of its gains and keep going, sometimes hitting the original stop-loss and closing at a loss.

The nuance that trips people up is that a round-tripper is not the same as a trade that simply loses from the start. It specifically describes the psychological sting of having been "up" (sometimes way up) and watching it evaporate. That gap between the paper gain and the final result is what makes the term useful: it points at a management failure (not adjusting risk as the trade moved), not necessarily an entry failure.

The original wording given for this term, profit target barely missed and then price drops to the stop loss, describes one specific version of a round-trip (a near-miss on the target followed by a full reversal to stop). The term is used more broadly for any meaningful reversal of open profit back to flat or negative, whether or not a formal profit target was set.