At the risk of stepping on some toes there are strategies which benefit from no stop losses, but anybody who tells you that they are only using stop losses for directional bets that are in the green...umm how do I put this? I would think long and hard before adopting that advise. As for when to tighten stops? You just have to have a tested stop management plan and stick to it, nobody knows where the market is going.
The breaking of a wave cannot explain the whole sea.