Rounding tops and bottoms are another reversal chart pattern. This requires more patience to trade than other patterns as they are slower to develop.
For a rounding bottom, as the price moves lower, the rate of decline begins to slow down. This is followed by a period of range trading, which eventually shifts to an up-trend. The example below shows a rounding bottom for GOLD in 2016
For a rounding top, as the price moves higher, the rate of increase begins to slow down. This is followed by a period of range trading, which eventually shifts to a down-trend. The example below is for OIL in 2016.
These can be traded similar to the double tops or bottoms. You can enter a position when the price breaks the support level of the pattern in the opposite direction to the initial trend, with your stop loss above/below the rounding bottom (Above for a buy, below for a sell). You take a profit when your position reaches a 2 –3 times the value of your initial risk.