USDCAD on H1 at 2017.06.12 18:00. The chart shows: that the fast average has just crossed below the slower of three averages. Short term momentum is carrying the price down and is in the direction of the cross down – a possible second sign of trend change from up to down. Check also the angle of the elbow joint on the short term moving average which if very acute, can be a sign of strength in that direction; a classical reversal candle has formed pointing the price action downwards potentially. Check whether it has appeared off a likely strong resistance, e.g. the top bollinger band, the top of a range, or a tested and re-tested resistance level. Consider that the market might retrace the reversal candle up to the 40%, 50% or 60% levels and the possibility therefore of a pending order with a stop above the hig (potential short). these signals firing off at the same time. Check the strength of the move, whether there has been a turn on strong resistance, a candlestick pattern, or test/restest off the top bollinger band or 20SMA and consider selling.
The chart is attached.