There has been a lot written about Bitcoin Misery Index:
The index is called the Bitcoin Misery Index (BMI) and was designed as a trading tool for investors to take advantage of volatility in BTC exchanges. BMI is calculated on a scale of zero to 100, taking into account factors such as volatility and the number of winning trades out of the total. When the indicator is low, the buying opportunity is at its best, and vice versa.
But all I find are just reviews; I cannot find the index itself! Is it somewhere freely available and updated?