The Market Makers need inventory Like to see the last hr to close.
All they can do at this point is drop the Bid to keep the flow orderly.
The month will be closing out Tuesday day after Memorial day Friday will be a shorten day. If they take the price down it would be a blink they have no inventory.
I checked the chart HDSI 001 no chart so I guess the Bid need to be .001 or higher. Hiding the Bid is to benefit the Market Makers. It's okay we'll have a chart soon.