I see that the USD-INR forex rates seem to change only during the normal business hours in India. Are those the only hours for forex trading in USD-INR? If so, what about all those services that offer 24 hour trading -- is there some misunderstanding on my part?

Thanks.

Answer
If you are in India and looking for the 24 hrs trading, in my openion, you cannot. NSE is not round the clock market like forex. I am not suer if there are any regulations in place from Inida (RBI)

US Dollar Index - Against Which Day Trading Forex Currencies Has The US Dollar Rallied?

Answer
Among the day trading forex currencies the US Dollar (USD) has seen gains against the:
- Canadian Dollar (CAD)
- Japanese Yen (JPY)
- Australian Dollar (AUD)

The US Dollar has also gained against the Indian Rupee (INR) and the Russian Rouble (RUB).

The biggest gains as of now have come from a rally against the Japanese currency, so if you're into trading USD, this is where you should continue to see profits over the short to medium term.

I recommend you look at Pound Sterling (GBP) as well as it's been a traditionally strong currency. Include it in your forex portfolio and part of your daily trade.