?? TDA and many others have online buying restrictions on dozens of penny stocks.
TDWaterhouse Canada doesn't allow online orders for most OTC BBs and many Pinks with their Webbroker platform. Why they allow more Pinks than reporting BBs is beyond me. However the same TDW has no restrictions on any stocks if one uses their Active Trader Platform.
They have given me various reasons for this, but none of them made any sense.