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Relative Strength Index (RSI)

Relative strength index is a momentum oscillator to indicate overbought and oversold conditions in the market. It oscillates between 0 and 100 and its values below a certain value, usually, 30 indicate an oversold market while values above another, say 70, indicate overbought conditions.  Typically, a look back period of 14 days is considered for its calculation and can be changed to fit the characteristics of a particular asset or trading style.

Calculation of RSI involves the following steps:

Average Gain  =   (previous average gain  x 13 + current gain)/14
  • First average gain   =  sum of gains in last 14 days/14

Average Loss  =  (previous average loss x 13 + current loss)/14
  • First average loss  =  sum of losses in  last 14 days/14

Relative Strength (RS)  = Average Gain / Average Loss

RSI =  100 – 100 / (1+RS)

Description: https://lh6.googleusercontent.com/Gg9WJPY7GB2y343ULeYYaWc6SfQCfNlUJyf15fauxccfcqm1mFlpOZ0_9zReCFdDpWVKsa7JaxmGBnQTeh3a2CU_FVCxYx4KGib49QRa8qdrhmLzjXSgSH8JWyop4UjRUKlRLsS4JT-e6eRvQA


In the chart above, red lines indicate both 14 days RSI plot and the levels for RSI,
while blue line indicates the close price of the cryptocurrency BTC/USD. As discussed above, at around 30 RSI plot is indicating oversold conditions and at around 70, the plot is indicating overbought conditions.


These overbought and oversold indications shouldn’t be interpreted as a direct buy/sell signals. Though, they can be a part of the signal generating decision process.