Like flying and hunting of a bird the Skimming Swallow should represent a super simple but effective strategy.

Used tools are EMA6 & 14, an EMA50 band (EMA of High, Low and Close in the middle) and a slightly modified Heiken Ashi to make the chart a bit smoother. Static S/R lines and simple PA patterns are very helpful as well. Don't use the EMA cross approach. It's misleading and late. The EMAs are for orientation and serve as dynamic S/R. See how the HA bars run up and down along these dynamic S/R in trends and swings always on the edge of EMA6.

Use H1 and above. Trendier currencies like GBP or the swingy JPY can also be traded on lower tfs. M1 and M5 (not recommended) can also be quiet smooth, but the higher the tf, the smoother the market appears with Heiken Ashi.

Conservative trading:
BUY: Enter when HA bar is blue and closes over all EMAs.
Exit when red HA bar closes below EMA14 or in flat markets below all EMAs.
SELL: Enter when HA bar is red and closes below all EMAs.
Exit when blue HA bar closes over EMA14 or in flat markets over all EMAs.

Aggressive trading when PA pattern(s) are in your favor:
BUY: Enter when HA bar is blue and closes over EMA6&14.
Exit when red HA bar closes below EMA14 or in flat markets below all EMAs.
SELL: Enter when HA bar is red and closes below all EMA6&14.
Exit when blue HA bar closes over EMA14 or in flat markets over all EMAs.

(all EMAs means EMA6&14 and the outer band of EMA50, either EMA50_High in upmove or EMA50_Low in downmove).

You can also swing or even scalp with it. It depends on you and how you interpret the template and the market. You also can add oscillators and Pivot, Murrey Math or Sweet spots. I use EMAs on all tfs. Daytrader maybe prefer the SMA and can add the SMA200. But keep it simple.