Dont know what kind of trade you are pertaining too since there are different kinds of trade. (Trade Altcoin/Forex/Stocks) and (Trade- Peer to peer transactions of Goods/Money etc).
I dont know which would i answer but lets make an assumption,if you are talkingg about trading on altcoin or either bitcoin, trade usually take depending on the movement of a certain coin and if you decide to sell off on a certain point then that would be the period of such trade.When you are talking about trade p2p of goods usually this will not took to long.