Rate of Change (ROC)

var ROC = require('technicalindicators').ROC var data = [11045.27,11167.32,11008.61,11151.83,10926.77,10868.12,10520.32,10380.43,10785.14,10748.26,10896.91,10782.95,10620.16,10625.83,10510.95,10444.37,10068.01,10193.39,10066.57,10043.75]; var period = 12; var expectResult = [-3.85,-4.85,-4.52,-6.34,-7.86,-6.21,-4.31,-3.24]; ROC.calculate({period : period, values : data})