There's nothing wrong with taking rest after a long while of observing the market. You need it so that you can function well and it increases your awareness with the changes that happens in the market. You can also try getting help from your friends who might be awake while you are resting and have them tell you if there are some short drops and margins. Short-time trading is really time consuming, you need to always keep an eye at the market price change but still your health should be prioritized than your income or else you might end up using your earning for medications or hospitalization.