DSNY has the volume spike you look for in a pump. Click Alerts/ Pre-market highs (leave box blank next to it). Block Trades 25,000.
Click Filters then scroll to Price. make the minimum .01 and maximum .99.
Click Symbol list and check all boxes.
The spike was a $35,000 buy at around .25 cents at 12:18pm friday.
I have not bought shares in DSNY because further research is needed.