Economy of US can be considered as a highly market economy.
Explanation:
The spectrum between the command-mixed- market economies depend on the level of government intervention of the market and how much the produce of the economy depends on the market practices or the artificial rules of the government put in place.
In US the market is dictated by the market rule only and the government has very little to do apart from the terms of the sanctions it lays on them.
So, the economy tends towards the market and not to the command.
