I just shorted Rio Tinto intraday again.
Just a small position this time, about $300k. The position was accumulated via $20k transactions. I wanted to take a bigger position, but the price went down quickly before I could make enough trades. Taking into account trading fees, the profit was about $4.7k.
I typically do not trade intraday. My bigger profits in the past were from holding positions for at least a few days. However, I am adjusting my strategy during this period to hold for shorter periods and take intraday profits if possible, as things can change very quickly!