CreateAndShowZigzag

Library "CreateAndShowZigzag"
Functions in this library creates/updates zigzag array and shows the zigzag

getZigzag(zigzag, prd, max_array_size) calculates zigzag using period
Parameters:

• zigzag: is the float array for the zigzag (should be defined like "var zigzag = array.new_float(0)"). each zigzag points contains 2 element: 1. price level of the zz point 2. bar_index of the zz point
  
• prd: is the length to calculate zigzag waves by highest(prd)/lowest(prd)
  
• max_array_size: is the maximum number of elements in zigzag, keep in mind each zigzag point contains 2 elements, so for example if it's 10 then zigzag has 10/2 => 5 zigzag points

Returns: dir that is the current direction of the zigzag

showZigzag(zigzag, oldzigzag, dir, upcol, dncol) this function shows zigzag
Parameters:

• zigzag: is the float array for the zigzag (should be defined like "var zigzag = array.new_float(0)"). each zigzag points contains 2 element: 1. price level of the zz point 2. bar_index of the zz point
  
• oldzigzag: is the float array for the zigzag, you get copy the zigzag array to oldzigzag by "oldzigzag = array.copy(zigzay)" before calling get_zigzag() function
  
• dir: is the direction of the zigzag wave
  
• upcol: is the color of the line if zigzag direction is up
  
• dncol: is the color of the line if zigzag direction is down

Returns: null

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