always set a stop even if you're investing, avoid leverage starting out.
a 5% drop can be a discount or a start of a bigger drop, the chart will explain whether its a buy/sell (work out your risk reward - and set stops accordingly)
Most important lesson to learn with (day/short term) trading is the mental aspect, most traders will loose more trades then they win. It's hard to accept or stay motivated early on. Once you understand that this is completely fine you'll realise it's not the number of winning trades that's important it's how much you make on each and how little you loose on the bad ones that's it all comes down to.
