1. Good speculators are always waiting, always patient. Waiting for the market to confirm their judgment
This is the greatest item every trader/investor needs. If Patience were an app, I would advise everyone to head to the playsi or app store and get one. Patience is a virtue when it comes to trading (even in other spheres of life too). It tasks investors to wait. Sometimes, the wait could be for days to get the seemingly right entry level. Sometimes, the wait could even cause one to miss out on trades because no one truly knows how dip a trade could go. No one can truly pick out a bottom.
2. Don't completely trust your judgment until the market's performance confirms your opinion
This is why Stop Loss is necessary. No system is perfect, let alone indicators. Systems fail, so also do indicators. Trades won't always go one's way or predictions and when they don't, it doesn't mean that one's system nor judgement is wrong. It simply means that one should review one's approach then.