Dollar-cost averaging (DCA) is an investment strategy in which an investor divides up the total amount to be invested across periodic purchases of a target asset in an effort to reduce the impact of volatility on the overall purchase. The purchases occur regardless of the asset's price and at regular intervals; in effect, this strategy removes much of the detailed work of attempting to time the market in order to make purchases of equities at the best prices. Dollar-cost averaging is also known as the constant dollar plan.
Source: Investopedia
