We are told several times on this forum never to leave your coins on exchange, well I know the difference about low rated exchanges and high rated exchanges and I know that many traders prefer high rated exchanges for trading because of volume and Liquidity but my point is there is no way to be a trader without your coins sleeping in exchange wallets, why? Because sometimes while you are asleep bitcoin can hit a new price target.
For example BTC is trading at 8000$ and I put up a sell order at 9000$, most times this won't happen in an instant, sometimes you wake up the next day and your order became successful isn't it? Now for those saying 'don't leave your coins on exchanges' how do you trade?
If you decide to avoid leaving your coins in an exchange then you are going to face several limitations, first of all day trading will become impossible and you will need to become a position trader or a swing trader, since it will be impossible for you to transfer your coins fast enough to the exchange to take advantage of the fast variations in the price.
Also you will be unable to use limit orders and will have to use market orders exclusively, this means you may not get the best possible price when you trade but if your strategy takes this into account then it should not be such a huge issue, however you still need to be careful and watch the slippage and avoid trading if it is too big for you.