$INKW $OPTI $XTRM Top 3 OTC Stocks To Watch: Greene Concepts Inc. (INKW), OPTEC International (OPTI), Extreme Biodiesel, Inc., (XTRM) http://www.equitiesobserver.com/featured/top-3-otc-stocks-to-watch-greene-concepts-inc-inkw-optec-international-opti-extreme-biodiesel-inc-xtrm/