一箫一剑平生意,负尽狂名十五年。这篇文章主要讲述mql4如何自定义画图相关的知识,希望能为你提供帮助。
mql4里很多自定义指标,将自定义指标拖入途中就能看到曲线图,俗话说,有图有真像,图是如何画的呢?我一直比较好奇,比如iMACD技术参数的图如下:
这个图是如何画的呢?
问题1,银色的线垂直的线如何画,红色的曲线如何画
问题2, 两条线的数据是如何获取的 ?
带着这2个问题,我们看下这个源码
还好Mql开放了这个源代码,我们可以研究下, 源码如下
//+------------------------------------------------------------------+
//|
Custom
MACD.mq4
|
//|
Copyright
?2004,
MetaQuotes
Software
Corp.
|
//|
http://www.metaquotes.net/
|
//+------------------------------------------------------------------+
#property
copyright
"Copyright
?2004,
MetaQuotes
Software
Corp."
#property
link
"http://www.metaquotes.net/"
//----
indicator
settings
#property
indicator_separate_window
#property
indicator_buffers
2
#property
indicator_color1
Silver
#property
indicator_color2
Red
#property
indicator_width1
2
//----
indicator
parameters
extern
int
FastEMA=12;
extern
int
SlowEMA=26;
extern
int
SignalSMA=9;
//----
indicator
buffers
double
MacdBuffer[];
double
SignalBuffer[];
//+------------------------------------------------------------------+
//|
Custom
indicator
initialization
function
|
//+------------------------------------------------------------------+
int
init()
//----
drawing
settings
SetIndexStyle(0,DRAW_HISTOGRAM);
SetIndexStyle(1,DRAW_LINE);
SetIndexDrawBegin(1,SignalSMA);
IndicatorDigits(Digits+1);
//----
indicator
buffers
mapping
SetIndexBuffer(0,MacdBuffer);
SetIndexBuffer(1,SignalBuffer);
//----
name
for
DataWindow
and
indicator
subwindow
label
IndicatorShortName("MACD("+FastEMA+","+SlowEMA+","+SignalSMA+")");
SetIndexLabel(0,"MACD");
SetIndexLabel(1,"Signal");
//----
initialization
done
return(0);
//+------------------------------------------------------------------+
//|
Moving
Averages
Convergence/Divergence
|
//+------------------------------------------------------------------+
int
start()
int
limit;
int
counted_bars=IndicatorCounted();
//----
last
counted
bar
will
be
recounted
if(counted_bars>
0)
counted_bars--;
limit=Bars-counted_bars;
//----
macd
counted
in
the
1-st
buffer
for(int
i=0;
i<
limit;
i++)
MacdBuffer[i]=iMA(NULL,0,FastEMA,0,MODE_EMA,PRICE_CLOSE,i)-iMA(NULL,0,SlowEMA,0,MODE_EMA,PRICE_CLOSE,i);
//----
signal
line
counted
in
the
2-nd
buffer
for(i=0;
i<
limit;
i++)
SignalBuffer[i]=iMAOnArray(MacdBuffer,Bars,SignalSMA,0,MODE_SMA,i);
//----
done
return(0);
//+------------------------------------------------------------------+
#property
indicator_buffers 2
定义了有2条线
#property
indicator_color1
Silver
#property
indicator_color2
Red
定义颜色 ,银色和红色
#property
indicator_width1
2
定义线的宽度。
extern int FastEMA=12;
extern int SlowEMA=26;
extern int SignalSMA=9;
iMACD的参数,我也不太明白,但是这对理解图的画法不影响,先不去管它。
//---- indicator buffers
double
MacdBuffer[];
double
SignalBuffer[];
这里是重点,存放数据的数组。
int init()
//---- drawing settings
SetIndexStyle(0,DRAW_HISTOGRAM);
//设置第一条线的显示方式,这里就是垂直
SetIndexStyle(1,DRAW_LINE);
//水平线显示
SetIndexDrawBegin(1,SignalSMA);
//设置开始画的位置
IndicatorDigits(Digits+1);
//---- indicator buffers mapping
SetIndexBuffer(0,MacdBuffer);
SetIndexBuffer(1,SignalBuffer);
//---- name for DataWindow and indicator subwindow label
IndicatorShortName("MACD("+FastEMA+","+SlowEMA+","+SignalSMA+")");
SetIndexLabel(0,"MACD");
SetIndexLabel(1,"Signal");
//---- initialization done
return(0);
具体我就不一一解释了,后面有英文的注释,应该比较容易明白 ,因为系统没有ima的指标图,通过修改这个代码,我们可以画出iMA的指标图
//+------------------------------------------------------------------+
//|
Custom
MACD.mq4
|
//|
Copyright
?2004,
MetaQuotes
Software
Corp.
|
//|
http://www.metaquotes.net/
|
//+------------------------------------------------------------------+
#property
copyright
"Copyright
?2004,
MetaQuotes
Software
Corp."
#property
link
"http://www.metaquotes.net/"
//----
indicator
settings
#property
indicator_separate_window
#property
indicator_color1
Red
#property
indicator_width1
2
extern
int
SlowEMA=26;
extern
int
ma_shift=0;
double
MacdBuffer[];
double
SignalBuffer[];
//+------------------------------------------------------------------+
//|
Custom
indicator
initialization
function
|
//+------------------------------------------------------------------+
int
init()
SetIndexStyle(0,DRAW_HISTOGRAM);
IndicatorDigits(Digits+1);
SetIndexBuffer(0,MacdBuffer);
SetIndexLabel(0,"iMA");
return(0);
//+------------------------------------------------------------------+
//|
Moving
Averages
Convergence/Divergence
|
//+------------------------------------------------------------------+
int
start()
int
limit;
int
counted_bars=IndicatorCounted();
//----
last
counted
bar
will
be
recounted
if(counted_bars>
0)
counted_bars--;
limit=Bars-counted_bars;
//----
macd
counted
in
the
1-st
buffer
for(int
i=0;
i<
limit;
i++)
MacdBuffer[i]=iMA(NULL,0,SlowEMA,ma_shift,MODE_EMA,PRICE_CLOSE,i);
//----
done
return(0);
//+------------------------------------------------------------------+
创建这个脚本的时候请选择Custom indicator 模板来创建,编译后,就可以运行这个脚本了。
希望这篇文章能够对学习mql的朋友有所帮助.
MQL 虽然语法不难,但是那些技术指标好是难懂,希望有兴趣的朋友能够一起学习,探讨,共同进步!
【mql4如何自定义画图】
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