Very simple Ea to create.

the EA will start a Buy or Sell order for each candle.

So, when the next candle open higher than the earlier opened candle than the EA open a Buy order and it close the earlier order.

and when the next open candle starts lower than the earlier candle the EA open a Sell order and close the earlier order.

No more than 1 trade open at the same time. 

I also want an adjustable StopLoss.

Their is NO Take Profit.