This is caused by a position that is to low on cost. Mostly because it is only partially bought or partially sold. See example above LRC can't be sold, because minimum order size in quote currency is less than 5 EUR/USD cost. If the cost is higher, check the info on that particular position. It is possible it was partially sold and this position is now worth less than 5 EUR/USD. (The original cost is shown on dashboard.) How to solve: put this position in reserved so you don't get the message anymore. Next buy of this coin/pair put it back to positions and merge with the new position. Next time the full amount can be sold.