// v2024_B-1_2lines
// 28/04.2023

//@version=4
//=++==============================================================++=
study("Contrast Oscillator", overlay=false)
src      = input(close, title="Source")
dis      = input(false, type = input.bool, title="Contr?")
dish     = input(false, type = input.bool, title="Histogram?")


_coeff = input(defval=0.0, title="Coefficient", type=input.float)

var float alpha = atan(_coeff) / 3.14159265 + 0.5

//=++==============================================================++=
x = 0.0
y = 0.0
z = 0.0

if bar_index > 0
    x := (1.0 - alpha)*src + alpha*x[1]
    y := -alpha*x + x[1] + alpha*y[1]
    z := -alpha*y + y[1] + alpha*z[1]

t = 2*x - 0.5*y - 0.5*z
c = -x + y + z

//=++==============================================================++=
plot(dish?  t-c:na, title="OsMA Histogram", color=(t>=c)?color.aqua:color.yellow,    linewidth=3, transp = 40,   style=plot.style_histogram)
plot(t-c,   title="OsMA Line",              color=(t>=c)?color.blue:color.red,       linewidth=1, transp = 0,    style=plot.style_line)
plot(dis?   c-t:na, title="OsMA Contr",     color=(t>=c)?color.silver:color.silver,  linewidth=1, transp = 40,   style=plot.style_line)

//lot(dis?  0:na,     title="0 Line",    color=color.silver, linewidth=1, transp = 0,    style=plot.style_line)
//plot(dish? 0:na,     title="0 Line",    color=color.silver, linewidth=1, transp = 0,    style=plot.style_line)
plot(0,     title="0 Line",    color=color.silver, linewidth=1, transp = 60,    style=plot.style_line)