I was once given a 1 share fill, then the stock took off and never looked back. LOL. They use the piker bids to increase the swings in both directions. When they ran CEMJQ down to .47 I didn't get any shares at .47 or .48. I gt a few thousand at .49 and .50. No real fill until .505. So even though a couple cents makes a big difference in the bottom line if you're holding a few hundred thousand shares I don't view some of the swings as 'real'. I use a weekly chart a lot. Flattens out the swing.
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