Richagain, I took a quick look at those stocks you mentioned
MDMN, authorized 750,000,000 float 406,506,089 ~ operations in Chile ~ highly potential dog show, not worth the risk and never will it get over .10 on a good day
CDCH, 73,218,270, operations in Chile ~ We have adjacent claims to Medinah Minerals, Inc. (MDMN) on the Alto de Lipangue plateau, Ownership of the property is through the Chilean subsidiary of Cerro Dorado, Inc., namely Cerro Dorado (Chile). On a good day sell it at .15 and do not look back, a one shot wonder and no fiancial profile available
Rich, researching a stock, not listening to message board chatter, is the tool you need to survive