Some strategies involve placing simultaneous buy and sell orders, attempting to trade little and often both ways. (wisestockbuyer.com)
Arbitrage is the near simultaneous buying and selling of things in a market to profit off the price difference between an identical good in two different markets. (bitcoinist.com)
Arbitrage, as you likely know, is the simultaneous buying and selling of an asset to make money on the price difference. (mauldineconomics.com)