Sentiment indicators are technical indicators that measure the overall mood or sentiment of market participants towards a particular asset or market. These indicators are based on the idea that market sentiment can affect the price movements of an asset, and can be used to identify potential trends or reversals in the market.

Some common sentiment indicators include:

1. Put/Call Ratio: This indicator measures the ratio of put options (which bet on a decline in price) to call options (which bet on a rise in price) in the market. A high put/call ratio suggests that investors are bearish and expect the price to fall, while a low ratio suggests the opposite.

2. VIX Index: The VIX (or volatility index) measures the expected volatility in the market over the next 30 days. A high VIX suggests that investors are nervous and expect the market to be volatile, while a low VIX suggests the opposite.

3. Bullish/Bearish Percentages: These indicators measure the percentage of investors who are bullish (expecting the market to rise) or bearish (expecting the market to fall). A high bullish percentage suggests that investors are optimistic, while a high bearish percentage suggests the opposite.

4. News Sentiment: This indicator measures the sentiment of news articles related to a particular asset or market. Positive news sentiment suggests that investors are optimistic, while negative news sentiment suggests the opposite.

Overall, sentiment indicators can be useful in identifying potential trends or reversals in the market, but should be used in conjunction with other technical indicators and fundamental analysis for a more complete picture of the market.