PLS chart, page-23305

"There is actually no reason why gaps have to be filled"

I agree to that opinion. But a gap (up and down) usually (not always) shows an opportunistic speculation on that particular trading day which creates imbalance between supply and demand. And because the market tends to balance any imbalances, the gap is filled in the balancing process.

Now, what about the gap up created on 11 September?



That gap up was created by the sudden evaporation of the US negative news (the clear sign of a manufactured news!!) and the news that CATL suspended its lepidolite mining. So I tend to see that gap up as a correction to that opportunistic push down.

Will it be filled? Only if there is another event or news (real or manufactured) that provides such an opportunistic (predatory) behaviour.

No one can predict that.