KDJ指标就是随机指标,由K线、D线和J线这三条曲线共同构成,通过分析图表,我们可以得出,K、D、J分别用不同的颜色线条来表示,所谓的K线是指快速确认线,D线就是指慢速主干线,而J线则为方向明暗线。K值和D值的浮动范围是0~100,而J值则能够小于0或者大于100,可以波动的范围更广。KDJ是为了判断中短期行情走势而出现的。
KDJ指标的计算公式是:
RSV:=(CLOSE-LLV(LOW,N))/(HHV(HIGH,N)-LLV(LOW,N))100;
K:SMA(RSV,M1,1);
D:SMA(K,M2,1);
J:3K-2*D;
KDJ指标的一般使用:
1.指标>80时,回档机率大;指标<20时,反弹机率大;
2.K在20左右向上交叉D时,视为买进信号;
3.K在80左右向下交叉D时,视为卖出信号;
4.J>100时,股价易反转下跌;J<0时,股价易反转上涨;
5.KDJ波动于50左右的任何信号,其作用不大。
MT4中KDJ指标源代码
#property copyright "Copyright 2020,fxMeter"
#property link "https://www.mql5.com/zh/users/fxmeter"
#property version "2.00"
#property strict
#property indicator_separate_window
#property indicator_buffers 3
#property indicator_plots 3
//--- plot KLine
#property indicator_label1 "KLine"
#property indicator_type1 DRAW_LINE
#property indicator_color1 clrWhite
#property indicator_style1 STYLE_SOLID
#property indicator_width1 1
//--- plot DLine
#property indicator_label2 "DLine"
#property indicator_type2 DRAW_LINE
#property indicator_color2 clrGold
#property indicator_style2 STYLE_SOLID
#property indicator_width2 1
//--- plot JLine
#property indicator_label3 "JLine"
#property indicator_type3 DRAW_LINE
#property indicator_color3 clrDarkViolet
#property indicator_style3 STYLE_SOLID
#property indicator_width3 1
#property indicator_levelstyle STYLE_DOT
#property indicator_levelcolor clrSilver
#property indicator_level1 0
#property indicator_level2 20
#property indicator_level3 50
#property indicator_level4 80
#property indicator_level5 100
- //---- input parameters
- input int N =9;
- input int M1=3;
- input int M2=3;
- //--- indicator buffers
- double KBuffer[];
- double DBuffer[];
- double JBuffer[];
- double llv[],hhv[],rsv[];
- double p=0,p1=0;
- double f=0,f1=0;
- //+------------------------------------------------------------------+
- //| Custom indicator initialization function |
- //+------------------------------------------------------------------+
- int OnInit()
- {
- //--- indicator buffers mapping
- IndicatorBuffers(6);
- SetIndexBuffer(0,KBuffer);
- SetIndexBuffer(1,DBuffer);
- SetIndexBuffer(2,JBuffer);
- SetIndexBuffer(3,llv,INDICATOR_CALCULATIONS);
- SetIndexBuffer(4,hhv,INDICATOR_CALCULATIONS);
- SetIndexBuffer(5,rsv,INDICATOR_CALCULATIONS);
-
- for(int i=0;i<6;i++)
- {
- SetIndexDrawBegin(i,N+M1+M2);
- }
-
-
-
- SetLevelValue(0,0);
- SetLevelValue(1,20);
- SetLevelValue(2,50);
- SetLevelValue(3,80);
- SetLevelValue(4,100);
-
- string name = "KDJ("+ (string)N+","+(string)M1+","+(string)M2+")";
- IndicatorShortName(name);
-
- IndicatorDigits(2);
-
-
- if(N<=0||M1<=0||M2<=0) return(INIT_FAILED);
-
- p = 1.0/M1; p1 = 1-p;
- f = 1.0/M2; f1 = 1-f;
-
-
-
-
-
- //---
- return(INIT_SUCCEEDED);
- }
- //+------------------------------------------------------------------+
- //| Custom indicator iteration function |
- //+------------------------------------------------------------------+
- int OnCalculate(const int rates_total,
- const int prev_calculated,
- const datetime &time[],
- const double &open[],
- const double &high[],
- const double &low[],
- const double &close[],
- const long &tick_volume[],
- const long &volume[],
- const int &spread[])
- {
- //---
- int i,limit=0;
- if(rates_total<=0)return(0);
- if(prev_calculated<=0)limit=rates_total-1;
- else limit = rates_total - prev_calculated +1;
-
-
- for(i=limit; i>=0; i--)
- {
- llv=0; hhv=0;
- if(i>rates_total-N) continue;
- int shift = iLowest(NULL,0,MODE_LOW,N,i);
- llv = low[shift];
- shift = iHighest(NULL,0,MODE_HIGH,N,i);
- hhv = high[shift];
- }
- for(i=limit; i>=0; i--)
- {
- rsv = 0;
- if(hhv>0 && llv>0 && (hhv-llv)!=0)
- rsv = (close-llv)/(hhv-llv)*100;
- }
-
-
- for(i=limit; i>=0; i--)
- {
- if(i==rates_total-1) KBuffer=0;
- else
- {
- KBuffer = rsv*p + KBuffer[i+1]*p1;
- }
- }
-
-
- for(i=limit; i>=0; i--)
- {
- if(i==rates_total-1) DBuffer=0;
- else
- {
- DBuffer = KBuffer*f + DBuffer[i+1]*f1;
- }
- }
-
-
- for(i=limit; i>=0; i--)
- {
- JBuffer = 3*KBuffer - 2*DBuffer;
- }
-
-
-
-
- //--- return value of prev_calculated for next call
- return(rates_total);
- }
-
- //+------------------------------------------------------------------+
-
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