/*********************************************************
Alexis C. Montenegro © October 2005                       
Use and/or modify this code freely. If you redistribute it
please include this and/or any other comment blocks and a 
description of any changes you make.                      
**********************************************************/

function preMain() {
    setPriceStudy(false);
    setStudyTitle("Symbol");
    setCursorLabelName("Open", 0);
    setCursorLabelName("High", 1);
    setCursorLabelName("Low", 2);
    setCursorLabelName("Close", 3);
    setDefaultBarFgColor(Color.black, 0);
    setDefaultBarFgColor(Color.black, 1);
    setDefaultBarFgColor(Color.black, 2);
    setDefaultBarFgColor(Color.black, 3);
    setPlotType(PLOTTYPE_DOT, 0);
    setPlotType(PLOTTYPE_DOT, 1);
    setPlotType(PLOTTYPE_DOT, 2);
    setPlotType(PLOTTYPE_FLATLINES, 3);
    setDefaultBarThickness(0, 0);
    setDefaultBarThickness(0, 1);
    setDefaultBarThickness(0, 2);
    setDefaultBarThickness(0, 3);
    askForInput();
    var fp1 = new FunctionParameter("Symbol", FunctionParameter.STRING);
	fp1.setDefault();
	var fp2 = new FunctionParameter("Wick", FunctionParameter.COLOR);
	fp2.setDefault(Color.black);
	var fp3 = new FunctionParameter("Bars", FunctionParameter.NUMBER);
	fp3.setDefault(200);
}

var bInit = false;
var xOpen = null;
var xHigh = null;
var xLow  = null;
var xClose = null;
var iCntr = 0;
var vColor = Color.black;

function main(Symbol,Wick,Bars) {
    if(bInit==false){
        if(Symbol==null) Symbol = getSymbol();
        xOpen = open(sym(Symbol));
        xHigh = high(sym(Symbol));
        xLow  = low(sym(Symbol));
        xClose = close(sym(Symbol));
        bInit = true;
    }
    if (getBarState()==BARSTATE_NEWBAR) {
        iCntr++;
        if (iCntr>Bars) iCntr = 0;
    }
    var nOpen = xOpen.getValue(0);
    var nHigh = xHigh.getValue(0);
    var nLow = xLow.getValue(0);
    var nClose = xClose.getValue(0);
    if(nHigh==null||nLow==null||nOpen==null||nClose==null) return;
    if(nClose>nOpen) vColor=Color.RGB(0,190,0);
    else if(nClose<nOpen) vColor=Color.red;
    else vColor=Color.grey;
    drawLineRelative(0, nHigh, 0, nLow, PS_SOLID, 1, Wick, "Shadow"+iCntr);
    drawLineRelative(0, nOpen, 0, nClose, PS_SOLID, 1, vColor, "Body"+iCntr);
    setBarBgColor(vColor,0,nOpen,nClose);
    setBarFgColor(vColor,3)
    return new Array (nOpen, nHigh, nLow, nClose); 
}