Marker Therapeutics Inc (MRKR)

[microcapbiotech]

Can someone explain this to me?
Why is it that someone can buy a block of 200,000 shares …
but I can neither buy or sell 5000 shares as one trade.

Last week I bought at 5.04, but it took a dozen different trades over a few seconds. Same thing when I sold at 5.54.

Now, same thing today, a dozen trades and my buy at 5.21 STILL not completely filled, I'm still 975 shares short of filled.

Does the hardness to buy mean that only small time players are selling?

If only small time players are selling and big time are holding, is that a good sign for the future?

I just want to know how can it be so hard to buy a measly 5000 shares?