Talk:Trader

i want to know if there is some function to obtain the sell-buy rate.

It seems to increase the porcentage of lose for lower prices items, than the high- priced ones.

I took this info on some current online prices

Sell-	Buy-	Profit %

30-	130-	433%

50-	150-	300%

60-	160-	267%

70-	160-	229%

80-	180-	225%

90-	180-	200%

1800-	2400-	133%

2900-	3700-	128%

6000-	8000-	133%

I can graphic it (i don't know how to put a graphic here) and some formulae may be obtained. any help?