Difference in price change

Compares price change between current symbol and other one (eg. BTC vs S&P500). It calculates price change on each bar (from high to low or from open to close) and compares with price change of equivalent bar from the other source.

Example
Current symbol

• open = 10 USD
  
• close = 7 USD
  
• change = -3 USD
  
• % change = -30%
  

Second symbol

• open = 3 USD
  
• close = 4 USD
  
• change = +1 USD
  
• % change = +33%
  

Performance of price change = (-30) - (+30) = -63 // It means that current source has weaker performance right now