Here is a good trading strategy that needs to be used >>>
Have a look at the last candle on the chart.
Going down nicely isn’t it? 
Nice trade!!
Lots of pips!!
OK, now look at the same chart a little while later >>>
Hey!!
What have you done?!!
Let all those pips go in a retracement!! :eek:
Given back 80% of your profit?
That’s terrible!!
When you get a good spike way past the BB, it is best to exit at the best possible moment as in the top chart.
There will always be a major retracement in such cases.
So exit well before signs of retracement, then let the candle retrace back and you can then re-enter.
It takes a very long time in a short trade for the standard price action to come again to such a low point as the spike!!