How create static trendline object on chart by MQL4?

External question — Stack Overflow Stack Exchange Author: user18173771 Original post: https://stackoverflow.com/questions/71749594 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. I want a down trend line whenever the highest candle in the previous 500 bars is higher than latest 5 candles highest bar. However the trend line is created the first time but does not update. int highestCandle=iHighest(Symbol(),0,MODE_HIGH,500,0); if(High[highestCandle]>High[5]) { ObjectCreate(0,"HT",OBJ_TREND,0,Time[highestCandle],High[highestCandle],Time[0],High[0]); ObjectSetInteger(0,"HT",OBJPROP_COLOR,clrBlue); ObjectSetInteger(0,"HT",OBJPROP_STYLE,STYLE_SOLID); ObjectSetInteger(0,"HT",OBJPROP_RAY,true); } I do not want to delete this object and recreate on every new tick, I would just like it to be updated on the chart.

External answer — Stack Overflow Stack Exchange Author: PaulB Original post: https://stackoverflow.com/a/71750603 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. Because you have already created your object, trying to create it again will not move the coordinates. You need to use ObjectMove . Try the following code: int highestCandle=iHighest(Symbol(),0,MODE_HIGH,500,0); if(High[highestCandle]>High[5]) { ObjectCreate(0,"HT",OBJ_TREND,0,Time[highestCandle],High[highestCandle],Time[0],High[0]); ObjectSetInteger(0,"HT",OBJPROP_COLOR,clrBlue); ObjectSetInteger(0,"HT",OBJPROP_STYLE,STYLE_SOLID); ObjectSetInteger(0,"HT",OBJPROP_RAY,true); ObjectMove("HT",0,Time[highestCandle],High[highestCandle]); ObjectMove("HT",1,Time[0],High[0]); }