Adjusting your open position from ie. 10x leverage to 100x leverage mid movement doesn't magically turn your entire open position into 100x leverage. The only thing it does is take your open position down to 10% of it current position releasing 90% of the balance roughly back for you to trade and then the remaining trade is at 100x.
Based on what he said about $1 movement is worth about $75(R1000) in gain it would suggest he a decent size position open at 100x at 4666 if that is the case well done but the entire story doesn't really make sense to me its pure madness in straight up gambling such a leveraged long position by essentially FOMO'ing in at 4666.
I just thought he was a more level headed trader, that is just plain and simple gambling not to mention FOMOing in at 4666 at 100x he would have been liquidated the price had more than one 0.5% move against 4666 at that time.
In short that just doesn't reflect sane trading strategy but each to their own I guess.