Yes if he had no intention of filling the sell order.
The Sun
A second after it placed the buy order, the sell order went through at 826p per share.
Times, Sunday Times
This instructs the broker to place a buy or sell order when specified shares hit an agreed price.
Times, Sunday Times
She put in a market sell order first thing, got out at $1.60 and was glad of it.
Globe and Mail
In the latter case, investors will place a buy or sell order in a mutual fund after its price has been established at the end of the trading day.
Globe and Mail