Personally I'd worry more about what the major banks are doing as opposed to the meager ones. In any case unless you plan on bartering with commodities for your Chinese and Indian currencies you'll need to purchase them with another currency, making the transaction a currency pair. If your bearish on the USD then you would sell USD in exchange for the currency your bullish on.
I am going to ask again. Where I can buy China and India currencies? But must be single, not pairs. Oanda has pairs and if I short the USD they charge big interest
jerry everything is in pairs because if you buy a chinese xxx then you need to pay for it with a pick your other side of the pair In your case you probably want China/usd and India/usd. Or the opposite. Be careful to get your longs and shorts right.