Short term trading and overnight

Sylvain's trades lasts often some days to some weeks. Usually, 10 % of his trades are intradays, 30 % are swings of some days (two or three days), 40 % are swings of some weeks (one or two) and finally 20 % can be considered as middle term (more than two weeks to two months). He prefers markets in established tendency rather than halting markets.
In fact, the management of positions is less wearing in overnight (it means that positions are not enclosed at the end of day) than in intraday (it means that positions are enclosed before the end of journey), where it is necessary to remain every second in front of your computer to check your positions. In fact, overnight trading allows greater flexibility and margin of error. So, it gives more detachment and control of the market tendency. Also, it avoid wrong signs on which the intraday trader can become trapped.