Tarama formülü

// This work is licensed under a Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) https://creativecommons.org/licenses/by-nc-sa/4.0/
// © LuxAlgo

//@version=5
indicator("McDonald's Pattern [LuxAlgo]",overlay=true,max_lines_count=500,max_bars_back=500)
length = input(30)
from_start = input(true,'Use First Bar As Vertex')

css = input(#FFC72C,'Shape Color',group='Style')
min_width = input(2,'Width',inline='b',group='Style')
max_width = input(30,'',inline='b',group='Style')

colored_area = input(true,'Area',inline='c',group='Style')
css_dn = input(#DA291C,'',inline='c',group='Style')
css_up = input(#0cb51a,'',inline='c',group='Style')
show_score = input(true,"McDonald's Score")
//----
os = 0
src = close
n = bar_index
var float valtop = na
var float valbtm = na
var tb = table.new(position.top_right,1,2)
//------------------------------------------------------------------------------
var Y = array.new_float(0)
var X = array.new_int(0)

a = math.max(close,open)
b = math.min(close,open)

upper = ta.highest(a,length)
lower = ta.lowest(b,length)

os := a[length] > upper ? 0 : b[length] < lower ? 1 : os[1]

btm = os == 1 and os[1] != 1
top = os == 0 and os[1] != 0

if top
    array.unshift(Y,a[length])
    array.unshift(X,n-length)
if btm
    array.unshift(Y,b[length])
    array.unshift(X,n-length)
//----
plotchar(top ? high[length] : na,"Top",'',location.abovebar,offset=-length,size=size.tiny)
plotchar(btm ? low[length] : na,"Bottom",'',location.belowbar,offset=-length,size=size.tiny)
//----
a_y = 0.,b_y = 0.
c_y = 0.,d_y = 0.
if barstate.islast
    dist_a = 0.
    dist_b = 0.
    
    for l in line.all
        line.delete(l)
    if from_start
        array.unshift(Y,close)
        array.unshift(X,n)
    
    max = array.max(array.slice(Y,0,5))
    min = array.min(array.slice(Y,0,5))
    val = array.get(Y,0) < array.get(Y,1) ? min : max
    //----
    dist1 = array.get(X,0) - array.get(X,2)
    
    a_y := array.get(Y,2),b_y := array.get(Y,1)
    c_y := array.get(Y,1),d_y := array.get(Y,0)
    
    float y1 = na
    for i = 0 to dist1
        k = i/dist1
        y2 = a_y*math.pow(1 - k,3) + 3*b_y*math.pow(1 - k,2)*k + 3*c_y*(1 - k)*math.pow(k,2) + d_y*math.pow(k,3)
        dist_a += math.abs(y2 - val)
        
        r = (array.get(X,0) - array.get(X,1))/dist1
        w = min_width + math.abs(i/dist1 - r)*(max_width-min_width)
        line.new(array.get(X,2)+i,y2,array.get(X,2)+i-1,y1,color=css,width=w)
        y1 := y2
    //----
    dist2 = array.get(X,2) - array.get(X,4)
    
    a_y := array.get(Y,4),b_y := array.get(Y,3)
    c_y := array.get(Y,3),d_y := array.get(Y,2)
    
    y1 := na
    for i = 0 to dist2
        k = i/dist2
        y2 = a_y*math.pow(1 - k,3) + 3*b_y*math.pow(1 - k,2)*k + 3*c_y*(1 - k)*math.pow(k,2) + d_y*math.pow(k,3)
        dist_b += math.abs(y2 - val)
        
        r = (array.get(X,3) - array.get(X,4))/dist2
        w = min_width + math.abs(i/dist2 - r)*(max_width-min_width)
        line.new(array.get(X,4)+i,y2,array.get(X,4)+i-1,y1,color=css,width=w)
        y1 := y2
        
    if colored_area
        area_css = array.get(Y,0) < array.get(Y,1) ? css_dn : css_up
        box.delete(box.new(array.get(X,4),max,
          array.get(X,0),min,
          border_color=na,
          bgcolor=color.new(area_css,80))[1])

    if from_start
        array.shift(Y)
        array.shift(X)
    //----
    a = dist_a/dist1
    b = dist_b/dist2
    score = (1 - math.abs(a/(a+b) - .5)*2)*100
    
    if show_score
        table.cell(tb,0,0,"McDonald's Score",text_color=color.gray)
        table.cell(tb,0,1,str.tostring(score,'#.##')+'%',text_color=color.gray)
// I'm lovin' it

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