请教老师解答.学生在这里先谢谢了.

[[删除]]

这个是一个分形的指标.但是我发现他的参数里面设置是个3.

我看不懂这个3是什么意思.

是跨越3个分形吗?还是什么

本人比较菜鸟.希望老师在这里解答..别嫌弃呵呵

//+------------------------------------------------------------------+
//| FractalLevels.mq4 |
//| Copyright ?2008, lotos4u |
//| [e-mail] |
//+------------------------------------------------------------------+
#property copyright "Copyright ?2008, lotos4u"
#property link "[e-mail]"

#property indicator_chart_window
#property indicator_buffers 4

#property indicator_width1 4
#property indicator_width2 4
#property indicator_width3 2
#property indicator_width4 2

#property indicator_color1 Red
#property indicator_color2 Blue
#property indicator_color3 Gold
#property indicator_color4 Gold

//---- input parameters
extern int FractalBars = 3;

//---- buffers
double ExtMapBuffer1[];
double ExtMapBuffer2[];
double ArrowUpBuffer3[];
double ArrowDownBuffer4[];

//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int init()
{
SetIndexStyle(0, DRAW_ARROW);
SetIndexStyle(0, DRAW_LINE);
SetIndexArrow(0, 158);
SetIndexBuffer(0, ExtMapBuffer1);
SetIndexEmptyValue(0, 0.0);
SetIndexLabel(0, "责嚓蜞朦眍?耦镳铗桠脲龛?);

SetIndexStyle(1, DRAW_ARROW);
SetIndexStyle(1, DRAW_LINE);
SetIndexArrow(1, 158);
SetIndexBuffer(1, ExtMapBuffer2);
SetIndexEmptyValue(1, 0.0);
SetIndexLabel(1, "责嚓蜞朦磬 镱滗屦骊?);

SetIndexStyle(2, DRAW_ARROW);
SetIndexArrow(2, 119);
SetIndexBuffer(2, ArrowUpBuffer3);
SetIndexEmptyValue(2, 0.0);
SetIndexLabel(2, "责嚓蜞?屡姓");

SetIndexStyle(3, DRAW_ARROW);
SetIndexArrow(3, 119);
SetIndexBuffer(3, ArrowDownBuffer4);
SetIndexEmptyValue(3, 0.0);
SetIndexLabel(3, "责嚓蜞?峦惹");
return(0);
}

//+------------------------------------------------------------------+
//| Custom indicator deinitialization function |
//+------------------------------------------------------------------+
int deinit(){return(0);}

//+------------------------------------------------------------------+
//| Custom indicator iteration function |
//+------------------------------------------------------------------+
int start()
{
int counted_bars = IndicatorCounted();
int periods[] = {0, PERIOD_M1, PERIOD_M5, PERIOD_M15, PERIOD_M30, PERIOD_H1,
PERIOD_H4, PERIOD_D1, PERIOD_W1, PERIOD_MN1};
int limit;
if(counted_bars > 0)
counted_bars--;
limit = Bars - counted_bars;

for(int i = limit; i > 0; i--)
{
//---- ma_shift 镳桉忄桠噱蝰 0, 镱蝾祗 黩?SetIndexShift, 恹琨忄屐 恹
ExtMapBuffer1[i] = isFractalUp(i, FractalBars);
if(ExtMapBuffer1[i] == 0)
ExtMapBuffer1[i] = ExtMapBuffer1[i+1];
else
ArrowUpBuffer3[i] = ExtMapBuffer1[i];

//ExtMapBuffer2[i] = iFractals(NULL, period0, MODE_LOWER, BS);
ExtMapBuffer2[i] = isFractalDown(i, FractalBars);
if(ExtMapBuffer2[i] == 0)
ExtMapBuffer2[i] = ExtMapBuffer2[i+1];
else
ArrowDownBuffer4[i] = ExtMapBuffer2[i];
}
return(0);
}

double isFractalUp(int index, int bars)
{
double max = High[index];
for(int i = index + bars; i >= (index - bars); i--)
{
if(High[i] == 0.0)return(0);
if(max <= High[i] && i != index)
{
if(max < High[i])
return(0);
if(MathAbs(i - index) > 1)
return(0);
}
}
return(max);
}

double isFractalDown(int index, int bars)
{
double min = Low[index];
for(int i = index + bars; i >= (index - bars); i--)
{
if(Low[i] == 0.0)return(0);
if(min >= Low[i] && i != index)
{
if(min > Low[i])
return(0);

if(MathAbs(i - index) > 1)
return(0);
}
}
return(min);
}

[Bryant]

3这个参数只在两个函数里边用到，分别是求最高价和最低价中用到。3的作用就是偏移的数值，也就是从历史回溯到当前的求最高价和最低价的截止时间是3个收盘之前。也就是最近三个k线柱周期不算进去。