Too expensive a way of doing it mate. Just reload above the top sell line, or wipe the lowest bid line and wait. You will know when the seller is gone when the dont come on down to your offer.
Buy as low as you can. More shares for the buck is a good thing. We have time.
A conditional buy order would look after any pump if a good announcement drops unexpectedly.
CHM Price at posting:
6.7¢ Sentiment: Buy Disclosure: Held
(20min delay)