i think i understand ...

The manipulation in summary:

1. sell about 10 radiant star gem in ridiculous cheap price (mayb 50% of your cost)
2. open another account directly buy out, if you are lucky, u will buy back at the same price of what you did in #1, or bad luck just get back 9 out of 10 (risk here)
3. you created "last average 10 trade" in super cheap price
4. other player who saw the price is dropping will sell their gem cheaper
5. then you already successfully making the gem price market cheaper
6. buy the cheaper gem in large quantity
7. wait for the price to increase, then sell it
8. repeat the process

P/S: you need good timing and billion of gold to manipulate it

good for community ma... but now no more liao... coz the price too high...

and i not even complete my gems... during low price but i no gold...

sad but true story...