Reduce-only orders allow traders to execute buy or sell orders which only reduce a current position, as opposed to opening an opposite long or short worth more than the existing value of your assets, letting you trade without the risk of over-exposing your positions.
Orders marked as "reduce-only" will be canceled if they would result in increasing the position size in the opposite direction. Whilst the reduce-only flag can be used with any order type, it is most useful when combined with stop orders.
For information on further order types, visitDelta Order Types. For video demonstrations, visit theDelta Youtube channel.