VALE - buy the dip

Not too proud of this one as I learned afterwards that the company was responsible for a terrible accident, part of the reason the price dropped so quickly.
Lesson learned, and next time I will do at least the minimum fundamental research rather than only looking at charts. For me that matters, and I wouldn't invest in oil for example.
Anyway, the general plan is to buy at the bottom of an upsloping channel, RSI swinging low in a range, and sell at the top.
Since I'm new to this it's a simple and slow timeframe strategy for swing trading, nothing too clever.
Should also be looking for divergences.