The SWFX Sentiment Index can be a valuable tool for intraday currency trading. The Index is based on transaction flow information and is designed to show long and short ratio in the most popular currency pairs. The percentage number of the ratio is simply the amount of longs or shorts in the overall amount of opened positions transacted in the SWFX marketplace. The SWFX Sentiment Index gauges effective speculative interest in currency pairs and currencies, and therefore can be used as a contrarian indicator. The index is updated every 30 minutes.