Major drawback in intraday trading is watching 5 or 15 minute or 30 minute charts all day.
This will make you sick and your eyes will be under severe pain.You will need a doctor because now you are addicted to intraday trading.
Well you need to see from another point of view.
Trading is about forecast future. You need to estimate if pair move up or down.
It is like weather forecast. They could do it for today or perhaps tomorrow. For a week or month? It does not work:)
So IMHO trying to forecast future for very close time has better success than for long term.