Those two EMAs really do pick up the correct speed of the trend..I find that stocks above say 20c are better on the 13 and stocks between 1c and 20c are a better on the 9...but with either of them a good day trade is when price is above the 62% Fib (in whatever time frame the trade is) simply buy at the EME and sell outside the BB..and for a counter trend trade (sell off or dump below the EMA) ..do the opposite ..buy below the BB and sell at the appropriate EMA..