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Rolling standard deviation shows standard deviation over n past values.
roll_sd(x, n)
numeric vector
window size
Other technical indicators: bbands, crossover, ema, roll_lm, roll_percent_rank, roll_range, roll_volume_profile, rsi, sma, stochastic
bbands
crossover
ema
roll_lm
roll_percent_rank
roll_range
roll_volume_profile
rsi
sma
stochastic