Relative Strength Index (RSI)

The Relative Strength Index (RSI) is a popular technical indicator used in financial markets to assess the momentum and strength of a price trend. We provide the best RSI API available.

Developed by J. Welles Wilder, the RSI is a momentum oscillator that measures the speed and change of price movements. It is typically applied to a price chart, oscillating between 0 and 100, with readings above 70 considered overbought and readings below 30 indicating oversold conditions. The Relative Strength Index is calculated based on the average gains and losses over a specified period, commonly 14 days. Traders and analysts use this indicator to identify potential trend reversals, overbought or oversold conditions, and to generate signals for buying or selling assets.

Get RSI values via API

We provide API access the RSI values for all of the most popular assets like stocks, crypto (try one of the popular exchanges like Binance) and forex, on all commonly used timeframes – from the weekly and daily all the way down to one minute intervals. You can also calculate the values on your own data using our manual method.

Customise RSI Sensitivity

When using the RSI technical indicator, you have the ability to fine-tune its responsiveness by adjusting the optional period parameter through the API. This parameter allows you to customize the number of candles considered in the RSI calculation. If you opt for a shorter period, the RSI becomes more sensitive, responding quickly to recent price changes and potentially signaling overbought or oversold conditions sooner. On the other hand, choosing a longer period smoothens the RSI’s output, offering a broader perspective on market trends. This feature lets you tailor the RSI to fit your specific trading strategies and timeframes, enhancing its effectiveness in various market conditions.

Get started with the rsi

Simply make an HTTPS [GET] request or call in your browser:

			[GET] https://api.taapi.io/rsi?secret=MY_SECRET&exchange=binance&symbol=BTC/USDT&interval=1h
		

The rsi endpoint returns a JSON response like this:

			{
  "value": 65.73211579249397
}
		

API parameters

More examples

Let's say you want to know the rsi value on the last closed candle on the 30m timeframe. You are not interest in the real-time value, so you use the backtrack=1 optional parameter to go back 1 candle in history to the last closed candle.

				[GET] https://api.taapi.io/rsi?secret=MY_SECRET&exchange=binance&symbol=BTC/USDT&interval=30m&backtrack=1
			

Get rsi values on each of the past X candles in one call

Let's say you want to know what the rsi daily value was each day for the previous 10 days. You can get this returned by our API easily and efficiently in one call using the backtracks=10 parameter:

				[GET] https://api.taapi.io/rsi?secret=MY_SECRET&exchange=binance&symbol=BTC/USDT&interval=1d&backtracks=10
			

Here's the example response:

				[
  {
    "value": 70.03713323772295,
    "backtrack": 0
  },
  {
    "value": 68.55107952179476,
    "backtrack": 1
  },
  {
    "value": 72.55100476679559,
    "backtrack": 2
  },
  {
    "value": 73.51409814264913,
    "backtrack": 3
  },
  {
    "value": 69.91451308499144,
    "backtrack": 4
  },
  {
    "value": 65.17308969691057,
    "backtrack": 5
  },
  {
    "value": 66.17910755701931,
    "backtrack": 6
  },
  {
    "value": 68.41845715627683,
    "backtrack": 7
  },
  {
    "value": 64.71596338703083,
    "backtrack": 8
  },
  {
    "value": 70.76586249275925,
    "backtrack": 9
  }
]
			

Looking for even more integration examples in different languages like NodeJS, PHP, Python, Curl or Ruby? Continue to [GET] REST - Direct documentation.