Индикатор наклонных уровней

Settings=              
        {                          
            Name = "AT-obl_can",   -- название индикатора
            delta=1.0,                  -- параметр индикатора  
            rep=5, 
            shif=0,			
            line=                                     
                {                               
                    {  
                        Name = "ln1",
                        Type =TYPE_LINE,
                        Width = 1,
                        Color = RGB(120,90, 140)
                    },
					{  
                        Name = "ln2",
                        Type =TYPE_LINE,
                        Width = 1,
                        Color = RGB(120,90, 140)
                    }
                }
       }


function Init()

    vMin = 0
    vMax = 0
    vMinindex = 0
    vMaxindex = 0
    voldMinindex = 0
    voldMaxindex = 0

  return 2
end


function OnCalculate(index)

  rep = Settings.rep
  shif = Settings.shif

  sz = Size()-shif
  
  if index <= sz then 

  if index == 1 then
    vMin = C(index)
    vMax = C(index)
    vMinindex = index
    vMaxindex = index
    voldMinindex = index
    voldMaxindex = index
    v = C(index)  
  else
         
    if voldMaxindex >= voldMinindex then
	  --if vMin~=nil then 
      if C(index) > (1 + Settings.delta/100)*vMin then
        vMin = C(index)  
        vMax = C(index) 
        vMaxindex = index
        voldMinindex = vMinindex 
        vFrom = vMinindex  
      else     
        if vMin > C(index) then
          vMin = C(index)
          vMinindex = index
          vFrom = voldMaxindex      
       else
          vFrom = vMinindex 
        end 
      end
	  --end
    else
     
    if voldMaxindex <= voldMinindex then
	  --if vMax~=nil then 
      if C(index) < (1 - Settings.delta/100)*vMax then
        vMax = C(index) 
        vMin = C(index)  
        vMinindex = index
        voldMaxindex = vMaxindex
        vFrom = vMaxindex
      else 
        if vMax < C(index) then
          vMax = C(index)
          vMaxindex = index
          vFrom = voldMinindex    
       else  
          vFrom = vMaxindex          
        end
      end  
	  --end
    end
    end
 
    --if vFrom~=nil then 
	--[[
    for i = vFrom, index do
	 
      k = (C(index)- C(vFrom))/(index- vFrom);
      v = i*k + C(index) - index*k
      SetValue(i, 1, v) 
    end --]] 
    --end
 
   if index == sz then
    for k = 1, 2 do
      vf = 1
	  vs = 0
	  if k == 1 then 
        if vMinindex < vMaxindex then
	      vf = vMinindex
		  vs = vMaxindex
		  up = 0
	    elseif vMinindex > vMaxindex then
	      vs = vMinindex
		  vf = vMaxindex
		  up = 1
	    end 	  
	  elseif k == 2 then  
        if voldMinindex < voldMaxindex then
	      vf = voldMinindex
		  vs = voldMaxindex
		  up = 0
	    elseif voldMinindex > voldMaxindex then
	      vs = voldMinindex
		  vf = voldMaxindex
		  up = 1
	    end 
	  end 
	  n = 0
	  xy = 0
	  x = 0
	  y = 0
	  xx = 0
      for i = vf, vs do	 
	    n = n + 1
	    xy = xy + i*C(i)
	    x = x + i
	    y = y + C(i)
	    xx = xx + i*i
      end
	  if (n*xx - x*x) ~= 0 and n ~= 0 then 
        a = (n*xy - x*y)/(n*xx - x*x)	
        b = (y - a*x)/n	  
		
		for j = 1, rep do 		
	      n = 0
	      xy = 0
	      x = 0
	      y = 0
	      xx = 0		
		  for i = vf, vs do	 		  
		    v = a*i + b
		    clc = 0
		    if up == 1 and C(i) > v then 
	          clc = 1	  
		    end 
		    if up == 0 and C(i) < v then 
		      clc = 1
		    end 
		    if clc == 1 then
	          n = n + 1
	          xy = xy + i*C(i)
	          x = x + i
	          y = y + C(i)
	          xx = xx + i*i		    		  
		    end 
		  end --[[--]]
	      if (n*xx - x*x) ~= 0 and n ~= 0 and n > 2 then 
            a = (n*xy - x*y)/(n*xx - x*x)	
            b = (y - a*x)/n	  		   --[[  --]]
		  end 
        end 
		for i = vf, sz do	 		  
		  v = a*i + b
		  if up == 1 and v >= C(vs) or up == 0 and v <= C(vs) then 
		    SetValue(i, k, v) 
		  end 
		end 		
 		
	  end 
	  
    end   	  
   end 
   end 
  end  

end