This oscillator is based between the relationship that exist between price and volume. It combines these values to help detect up and down trend.

It is devoted to detect short term trades based on standard deviation of recent moves, so bearish signals occurs when oscillator is crossing the lower deviation and bullish movement when oscillator is crossing down the upper deviation.

Parameters :

• period = 8
• cutoff = 1
• devH = 1.5
• devL = 1.3
• stdevper = 100

haOpen = ((Open[1]+High[1]+Low[1]+Close[1])+(Open[2]+High[2]+Low[2]+Close[2]))/2
haCl = ((Open+High+Low+Close)/4+haOpen+MAX(High,haOpen)+MIN(Low,haOpen))/4

haC = tema[period/1.6](haCl)
vav = average[period*5](volume)
vave = vav[1]
vmax = vave * 2

if(volume<vmax) THEN
vc = volume
else
vc = vmax
endif

vtr = tema[period](linearregressionslope[period](volume))

if haC>haC[1]*(1+cutoff/1000) AND vtr>=vtr[1] THEN
  tosum = vc
ELSIF haC<haC[1]*(1+cutoff/1000) AND vtr>vtr[1] THEN
  tosum = -vc
ENDIF

SVAPO = tema[period](summation[period](tosum)/(vave+1))

hi = devH*STD[stdevper](SVAPO)
lo = -devL*STD[stdevper](SVAPO)

RETURN SVAPO as "SVAPO", hi as "deviation High", lo as "deviation Low", 0 as "zero ref"