how to get current value of a trendline drawn on chart
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For large amounts of code, attach it. - Perhaps you should read the manual. ObjectGetValueByShift - Object Functions - MQL4 Reference
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Hi there this is an old indicator and I am trying to modify it from horizontal lines to trend lines , but I cant figure out how to read a trendline That I have added to the chart ,
any ideas or articles on this subject would be appreciated
cheers Ron
//| //+------------------------------------------------------------------+ indicator.mq4 |//|
//|
//+------------------------------------------------------------------+
//
//
extern bool AlarmOn =True; // Alarm on or off
extern bool SignalOnClose = False; // if false we use bid price to signal line break
extern string ResistanceLineName = "R_Alert"; // Line ID that will trigger alarm Note I rename trendline to "R_Alert" in its properties
extern string SupportLineName = "S_Alert"; // Line ID that will trigger alarm
extern string SoundFile = "alert2.wav"; // Sound ID
extern int DelayBetweenAlarm = 10; //
extern color SRLineClr = Lime; // SR Line color
extern color SRLineClr2 = Red; // SR Line color
extern int SRLineWidth = 2;
#property indicator_chart_window
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
//int init()
// {
//---- indicators
//---- indicators
//if(ObjectFind(ResistanceLineName) == -1) {
// ObjectCreate(ResistanceLineName, OBJ_TREND, 0, 0,iHigh(NULL, 0,0));
// }
// ObjectSet(ResistanceLineName, OBJPROP_COLOR, SRLineClr);
// ObjectSet(ResistanceLineName, OBJPROP_WIDTH, SRLineWidth);
// if(ObjectFind(SupportLineName) == -1) {
// ObjectCreate(SupportLineName, OBJ_TREND, 0, 0,iLow(NULL, 0, 0));
// ObjectSet(SupportLineName, OBJPROP_COLOR, SRLineClr2);
// ObjectSet(SupportLineName, OBJPROP_WIDTH, SRLineWidth);
// }
// return(0);
// }
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function |
//+------------------------------------------------------------------+
//int deinit()
// {
//----
//----
// if(UninitializeReason() != REASON_PARAMETERS && UninitializeReason() != REASON_CHARTCHANGE) {
// ObjectDelete (SupportLineName);
// }
//----
// return(0);
// }
//+------------------------------------------------------------------+
//| Custom indicator iteration function |
//+------------------------------------------------------------------+
int start()
{
//----
//----
if(AlarmOn){
double PreviousClosePrice = Bid;
if(SignalOnClose == true) {PreviousClosePrice = iClose(NULL, 0, 1);}
double ResistancePrice = ObjectGet(R_Alert, OBJPROP_PRICE1);
double SupportPrice = ObjectGet(SupportLineName, OBJPROP_PRICE1);
if(PreviousClosePrice > ResistancePrice && ResistancePrice !=0)Alerts(1);
if(PreviousClosePrice < SupportPrice && SupportPrice !=0)Alerts(2);
}
Print ("R_Alert= ", ResistancePrice); // NOTE I try to print value of trend line
//----
return(0);
}
//+------------------------------------------------------------------+
{ //in reverse ie }
static datetime AlertLastTime = 0;
if(TimeCurrent() > AlertLastTime ) {
AlertLastTime = TimeCurrent () + DelayBetweenAlarm;
PlaySound(SoundFile);
}
}