We get one way days about twice a month. When I say one way, it means the price heads in one direction for most of the morning session. Usually there is a pullback to 38% or 50% in about the first hour of trading, but after that price action slows down to a crawl. 5 minute candles are short in length, usually no more than 4 pts long.
For down days:
There are no pullbacks higher than the ubb (8 period) on the 5 min chat. Also look for bounces off the 20 EMA.
There usually are no higher swing highs on the 5 min chart
Every 30 to 60 minutes, it makes a new low, but not by a whole lot. 5 pts or so
Pullbacks to the 23.6% retracement or 20 EMA are good entry points for withtrend trades.
The one way day is most likely over when it puts in a higher high or you get past 12 noon when the US market is starting to wake up.
And finally, be prepared to wait a long time for your trades to reach their target. Take up knitting.