MTF Standard Deviation Bands Medley

//@version=2

study(title="MTF Standard Deviation Bands Medley", shorttitle="SDBM", overlay=true)

// Revision:    1
// Author:      JayRogers
//
// Description:
//  - A veritable banquet of MA basis calculations to choose from.
//  - 3 seperate sets of bands to tinker with.
//  - Optional breakout shapes with their own seperate multiplier.
//  - A fart, some love and kisses. ...and I may have dribbled a bit. Sorry.

// - INPUTS START
useRes  = input(defval=false, title="Use Fixed Resolution?")
setRes  = input(defval="15", title="Select Resolution", type=resolution)
maType  = input(defval="VWMA", title="Basis Calculation: SMA, EMA, WMA, VWMA, SMMA, DEMA, TEMA, HullMA, LSMA ( case sensitive )", type=string)
maSrc   = input(defval=close, title="Source", type=source)
maLen   = input(defval=20, title="Period", minval=1)
maOff   = input(defval=0, title="Offset", minval=0)
multA   = input(defval=2, title="Deviation A", minval=0, step=0.05)
multB   = input(defval=2.5, title="Deviation B", minval=0, step=0.05)
multC   = input(defval=3, title="Deviation C", minval=0, step=0.05)
showB   = input(defval=false, title="Disable Bands B?")
showC   = input(defval=false, title="Disable Bands C?")
multBr  = input(defval=3.5, title="Breakout Deviation", minval=0, step=0.05)
highBr  = input(defval=high, title="Break Up Source", type=source)
lowBr   = input(defval=low, title="Break Down Source", type=source)
showBr  = input(defval=false, title="Enable Breakout Markers?")
lsmaOff = input(defval=4, title="Offset for LSMA", minval=0)
// - INPUTS END

// - FUNCTIONS
// Returns chosen MA input calculation, default to SMA if blank or typo.
variant(type, src, len, lsma) =>
    v1 = sma(src, len)                                                  // Simple
    v2 = ema(src, len)                                                  // Exponential
    v3 = wma(src, len)                                                  // Weighted
    v4 = vwma(src, len)                                                 // Volume Weighted
    v5 = na(v5[1]) ? sma(src, len) : (v5[1] * (len - 1) + src) / len    // Smoothed
    v6 = 2 * v2 - ema(v2, len)                                          // Double Exponential
    v7 = 3 * (v2 - ema(v2, len)) + ema(ema(v2, len), len)               // Triple Exponential
    v8 = wma(2 * wma(src, len / 2) - wma(src, len), round(sqrt(len)))   // Hull
    v9 = linreg(src, len, lsma)                                         // Least Squares
    type=="EMA"?v2 : type=="WMA"?v3 : type=="VWMA"?v4 : type=="SMMA"?v5 : type=="DEMA"?v6 : type=="TEMA"?v7 : type=="HullMA"?v8 : type=="LSMA"?v9 : v1
// Return selected resolution series, or use current
reso(exp, use, res) => use ? security(tickerid, res, exp) : exp
// - FUNCTIONS END

// - SERIES VARIABLES
// Basis and deviation
basis       = reso(variant(maType, maSrc[maOff], maLen, lsmaOff), useRes, setRes)
devA        = multA * reso(stdev(maSrc, maLen), useRes, setRes)
devB        = multB * reso(stdev(maSrc, maLen), useRes, setRes)
devC        = multC * reso(stdev(maSrc, maLen), useRes, setRes)
// Breakouts
devBreak    = multBr * reso(stdev(maSrc, maLen), useRes, setRes)
highBreak   = showBr and highBr >= (basis + devBreak)
lowBreak    = showBr and lowBr <= (basis - devBreak)
// - SERIES VARIABLES END

// - PLOTTING
// Basis
plot(basis, title="basis", color=#999999, linewidth=2, transp=50)
// Upper bands
plot(basis + devA, title="Upper Band A", color=#006666, linewidth=2, transp=50)
plot(showB ? na : (basis + devB), title="Upper Band B", color=#009999, linewidth=2, transp=50)
plot(showC ? na : (basis + devC), title="Upper Band C", color=#00CCCC, linewidth=2, transp=50)
// Lower bands
plot(basis - devA, title="Lower band A", color=#006666, linewidth=2, transp=50)
plot(showB ? na : (basis - devB), title="Lower band B", color=#009999, linewidth=2, transp=50)
plot(showC ? na : (basis - devC), title="Lower band C", color=#00CCCC, linewidth=2, transp=50)
// Breakout shapes
plotshape(highBreak, title="High Break", style=shape.diamond, location=location.abovebar, size=size.tiny, color=#FF0000, transp=50)
plotshape(lowBreak, title="Low Break", style=shape.diamond, location=location.belowbar, size=size.tiny, color=#00FF00, transp=50)
// - PLOTTING END