Though keep in mind, if you have 20 MH/s in an Ethereum contract currently, you are better off switching to ETC as you can yield 0.1256 ETC for the same hashrate as opposed to the 0.009674 ETH this same mining power can give you. This is a good example of how shifting allocation can produce a more desired output based on what YOU want.

I suggest running your own numbers through a profitability tool as seen here : https://www.cryptocompare.com/mining/calculator/etc?HashingPower=20&HashingUnit=MH%2Fs&PowerConsumption=140&CostPerkWh=0.12