Is this too simplistic for day trading?

I have been trying to get into TA for a while now, and the more I get to know the more confused I get with all the different patterns, technical indicators and everything else in TA.

I like simplicity for trading and the one thing that has been consistent for me is the 'crossover' indicator. When the 10 day EMA crosses below the 20 day EMA then it's time to sell, when the 10 day EMA crosses above the 20 day EMA then it's time to buy.

I also look at the one hour chart with the 10 and 20 day EMA to determine the longer term trend and use the 15 minute chart to find the entry points.

For longer term trading I would use the one hour chart using the same system.

Is this way too simplistic as it's the only thing that's working for me at the moment.

Komen: