483300 EA for EMA crossover

I need an EA that buys and sells using an EMA crossover where the Faster EMA is 4 and the Slower EMA is 5. A signal is generated when the Faster EMA crosses the Slower EMA. Once a signal is generated, I then want to buy or sell as well as be able to reverse positions from long to short at the beginning of the next price bar after a signal has been generated.