Accelerator Oscillator

The Accelerator Oscillator (AC) is a momentum-based technical indicator developed by Bill Williams. It measures the acceleration or deceleration of the current market driving force, helping traders anticipate early shifts in momentum before a trend fully forms.

Unlike traditional oscillators that measure momentum directly, the Accelerator Oscillator goes a step further by analyzing the difference between the Awesome Oscillator (AO) and its 5-period simple moving average. This provides insights into whether bullish or bearish momentum is gaining or losing speed — a useful tool for traders aiming to spot early entry or exit signals.

The indicator fluctuates above and below a zero line. Positive values suggest that the acceleration is on the rise (bullish), while negative values imply a weakening bullish or strengthening bearish movement. Traders often use the change in histogram color (from red to green or vice versa) to detect potential reversals or confirm existing trends.

Accelerator Oscillator by TAAPI.IO

Get Accelerator Oscillator values via API

We provide API access to the AO 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.

Customize the Accelerator Oscillator

You can customize the Accelerator Oscillator by adjusting its two optional parameters: lengthFast and lengthSlow. These control the periods used in calculating the underlying Awesome Oscillator. Increasing lengthSlow (default: 34) smooths out long-term trends, while modifying lengthFast (default: 5) changes the sensitivity to short-term momentum shifts. Tuning these values allows traders to adapt the indicator to different market conditions or trading styles.

Use Cases

  • Detect early trend momentum before price movement confirms it.
  • Identify reversal zones based on momentum shift.
  • Combine with other indicators (like AO, MACD, or fractals) for more robust trading signals.

Get started with the accosc

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

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

API response

The accosc endpoint returns a JSON response like this:

			{
	"value": -876.3644529411649
}
Example response from TAAPI.IO when querying accosc endpoint.

API parameters

secret
Required String
The secret which is emailed to you when you request an API key.
exchange
Required String
The exchange you want to calculate the indicator from: binance, binancefutures or one of our supported exchanges. For other crypto / stock exchanges, please refer to our Client or Manual integration methods.
symbol
Required String
Symbol names are always uppercase, with the coin separated by a forward slash and the market: COIN/MARKET. For example: BTC/USDT Bitcoin to Tether, or LTC/BTC Litecoin to Bitcoin...
interval
Required String
Interval or time frame: We support the following time frames: 1m, 5m, 15m, 30m, 1h, 2h, 4h, 12h, 1d, 1w. So if you're interested in values on hourly candles, use interval=1h, for daily values use interval=1d, etc.
backtrack
Optional Integer
The backtrack parameter removes candles from the data set and calculates the accosc value X amount of candles back. So, if you are fetching the accosc on the hourly and you want to know what the accosc was 5 hours ago, set backtrack=5. The default is 0.
chart
Optional String
The chart parameter accepts one of two values: candles or heikinashi. candles is the default, but if you set this to heikinashi, the indicator values will be calculated using Heikin Ashi candles. Note: Pro & Expert Plans only.
addResultTimestamp
Optional Boolean
true or false. Defaults to false. By setting to true the API will return a timestamp with every result (real-time and backtracked) to which candle the value corresponds. This is especially helpful when requesting a series of historical values using the results parameter.
fromTimestamp
New Optional String
The start of the time range in Unix epoch time. For example: 1685577600
toTimestamp
New Optional String
The end of the time range in Unix epoch time. For example: 1731456000 If you only use fromTimestamp, the API will return all results from that time until present.
gaps
Optional Boolean
true or false. Defaults to true. By setting to false, the API will ensure that there are no candles missing. This often happens on lower timeframes in thin markets. Gaps will be filled by a new candle with 0 volume, and OHLC set the the close price of the latest candle with volume.
results
New Optional String
number or max. Use this parameter to access historical values on the past X candles until the most recent candle. Use max to return all available historical values. Returns an array with the oldest value on top and most recent value returned the last.
lengthSlow
Optional Integer

Default: 34

lengthFast
Optional Integer

Default: 5

More examples

Let's say you want to know the accosc 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/accosc?secret=MY_SECRET&exchange=binance&symbol=BTC/USDT&interval=30m&backtrack=1
Get accosc values on each of the past X candles in one call

Let's say you want to know what the accosc 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 results=10 parameter:

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

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