/* //----- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -+ //Version: Final, November 01, 2008 | Editing: Nikolay Kositsin farria@mail.redcom.ru | //----- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -+ This variant of the ZigZag indicator is recalculated at each tick only at the bars that were not calculated yet and, therefore, it does not overload CPU at all which is different from the standard indicator. Besides, in this indicator drawing of a line is executed exactly in the ZIGZAG style and, therefore, the indicator correctly simultaneously displays two of its extreme points (High and Low) at the same bar! Nikolay Kositsin //----- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -+ Depth is a minimum number of bars without the second maximum (minimum) which is Deviation pips less (more) than the previous one, i.e. ZigZag always can diverge but it may converge (or dislocate entirely) for the value more than Deviation only after the Depth number of bars. Backstep is a minimum number of bars between maximums (minimums). //----- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -+ Zigzag indicator is a number of trendlines that unite considerable tops and bottoms on a price chart. The parameter concerning the minimum prices changes determines the per cent value where the price must move to generate a new "Zig" or "Zag" line. This indicator filters the changes on an analyzed chart that are less than the set value. Therefore, Zigzag reflects only considerable amedments. Zigzag is used mainly for the simplified visualization of charts, as it shows only the most important changes and reverses. Also, it can be used to reveal the Elliott Waves and different chart figures. It is necessary to remember that the last indicator segment can change depending on the changes of the analyzed data. It is one of the few indicators that can change their previous value, in case of an asset price change. Such an ability to correct its values according to the further price changings makes Zigzag an excellent tool for the already formed price changes. Therefore, there is no point in creating a trading system based on Zigzag as it is most suitable for the analysis of historical data not forecasting. Copyright © 2005, MetaQuotes Software Corp. */ //+------------------------------------------------------------------+ //| ZigZag_NK.mq5 | //| Copyright © 2005, MetaQuotes Software Corp. | //| http://www.metaquotes.net/ | //+------------------------------------------------------------------+ //---- author of the indicator #property copyright "Copyright © 2005, MetaQuotes Software Corp." //---- link to the website of the author #property link "http://www.metaquotes.net/" //---- indicator version #property version "1.00" #property description "ZigZag" //+----------------------------------------------+ //| Indicator drawing parameters | //+----------------------------------------------+ //---- drawing the indicator in the main window #property indicator_chart_window //---- 2 buffers are used for calculation of drawing of the indicator #property indicator_buffers 2 //---- only 1 plot is used #property indicator_plots 1 //---- ZIGZAG is used for the indicator #property indicator_type1 DRAW_ZIGZAG //---- displaying the indicator label #property indicator_label1 "ZigZag_NK" //---- use blue violet color for the indicator line #property indicator_color1 BlueViolet //---- the indicator line is a long dashed line #property indicator_style1 STYLE_DASH //---- indicator line width is equal to 1 #property indicator_width1 1 //+----------------------------------------------+ //| Indicator input parameters | //+----------------------------------------------+ input int ExtDepth=12; input int ExtDeviation=5; input int ExtBackstep =3; //---- declaration of dynamic arrays that // will be used as indicator buffers double HighestBuffer[]; double LowestBuffer[]; //---- declaration of memory variables for recalculation of the indiator only at the previously not calculated bars int LASTlowpos,LASThighpos; double LASTlow0,LASTlow1,LASThigh0,LASThigh1; //---- Declaration of the integer variables for the start of data calculation int StartBars; //+------------------------------------------------------------------+ //| Custom indicator initialization function | //+------------------------------------------------------------------+ void OnInit() { //---- initialization of variables of the start of data calculation StartBars=ExtDepth+ExtBackstep; //---- set dynamic arrays as indicator buffers SetIndexBuffer(0,LowestBuffer,INDICATOR_DATA); SetIndexBuffer(1,HighestBuffer,INDICATOR_DATA); //---- restriction to draw empty values for the indicator PlotIndexSetDouble(0,PLOT_EMPTY_VALUE,0.0); PlotIndexSetDouble(1,PLOT_EMPTY_VALUE,0.0); //---- create labels to display in Data Window PlotIndexSetString(0,PLOT_LABEL,"ZigZag Lowest"); PlotIndexSetString(1,PLOT_LABEL,"ZigZag Highest"); //---- indexing the elements in buffers as timeseries ArraySetAsSeries(LowestBuffer,true); ArraySetAsSeries(HighestBuffer,true); //---- set the position, from which the Bollinger Bands drawing starts PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,StartBars); PlotIndexSetInteger(1,PLOT_DRAW_BEGIN,StartBars); //---- Setting the format of accuracy of displaying the indicator IndicatorSetInteger(INDICATOR_DIGITS,_Digits); //---- name for the data window and the label for sub-windows string shortname; StringConcatenate(shortname,"ZigZag (ExtDepth=", ExtDepth,"ExtDeviation = ",ExtDeviation,"ExtBackstep = ",ExtBackstep,")"); IndicatorSetString(INDICATOR_SHORTNAME,shortname); //---- } //+------------------------------------------------------------------+ //| 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[]) { //---- checking the number of bars to be enough for the calculation if(rates_totalrates_total || prev_calculated<=0) // checking for the first start of the indicator calculation { limit=rates_total-StartBars; // starting index for calculation of all bars lastlow1=-1; lasthigh1=-1; lastlowpos=-1; lasthighpos=-1; } else { limit=rates_total-prev_calculated; // starting index for calculation of new bars //---- restore values of the variables lastlow0=LASTlow0; lasthigh0=LASThigh0; lastlow1=LASTlow1; lasthigh1=LASThigh1; lastlowpos=LASTlowpos+limit; lasthighpos=LASThighpos+limit; } //---- indexing elements in arrays as timeseries ArraySetAsSeries(high,true); ArraySetAsSeries(low,true); //---- first big indicator calculation loop for(bar=limit; bar>=0 && !IsStopped(); bar--) { //---- store values of the variables before running at the current bar if(rates_total!=prev_calculated && bar==0) { LASTlow0=lastlow0; LASThigh0=lasthigh0; } //---- low val=low[ArrayMinimum(low,bar,ExtDepth)]; if(val==lastlow0) val=0.0; else { lastlow0=val; if((low[bar]-val)>(ExtDeviation*_Point))val=0.0; else { for(back=1; back<=ExtBackstep; back++) { res=LowestBuffer[bar+back]; if((res!=0) && (res>val))LowestBuffer[bar+back]=0.0; } } } LowestBuffer[bar]=val; //---- high val=high[ArrayMaximum(high,bar,ExtDepth)]; if(val==lasthigh0) val=0.0; else { lasthigh0=val; if((val-high[bar])>(ExtDeviation*_Point))val=0.0; else { for(back=1; back<=ExtBackstep; back++) { res=HighestBuffer[bar+back]; if((res!=0) && (res=0; bar--) { //---- store values of the variables before running at the current bar if(rates_total!=prev_calculated && bar==0) { LASTlow1=lastlow1; LASThigh1=lasthigh1; LASTlowpos=lastlowpos; LASThighpos=lasthighpos; } curlow=LowestBuffer[bar]; curhigh=HighestBuffer[bar]; //---- if((curlow==0) && (curhigh==0))continue; //---- if(curhigh!=0) { if(lasthigh1>0) { if(lasthigh10) { if(lastlow1>curlow) LowestBuffer[lastlowpos]=0; else LowestBuffer[bar]=0; } //---- if((curlow