Bukkit

What steps will reproduce the problem?
1.  Purchase stocks
2.  Harvest the corresponding item
3.  Check prices

What is the expected output? What do you see instead?

I would expect that the more an item is harvested, the more its stock price goes up.  I just tested this, mining nearly 200 blocks of coal ore.  The initial price was 6.74/share, which then spiked up to 7.06, then immediately crashed to 6.40 within 30 seconds.  I'm not sure this was the intended outcome.  Otherwise, how would a player increase the stocks' price without buying/selling stocks?

What version of the product are you using?
1.2.1

Do you have an error log of what happened?
If needed I can provide a server log.

Please provide any additional information below.
I think more details in the User Manual would be beneficial to clarify how exactly stock prices are affected by player interactions.  As it is now, there is little information and it is quite confusing how this plugin is actually supposed to work.

can you give me more information ? about the number of people beeing at the server, the server-log, the log of ther plugin,...

@eitorf: Go

Server log: http://pastebin.com/MM3X1Dnw Sharemarket log: http://pastebin.com/VR3L5nFE

For the most part my server will have anywhere from 1-20 people online. Usually around 5.