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Is there a way to place an arrow at the previous bar before the current?

This will place an arrow at the currnet bar;

ObjectDelete("MdSymbolAi");
ObjectCreate("MdSymbolAi", OBJ_ARROW, 0, Time[0],vL);

ObjectSet("MdSymbolAi", OBJPROP_ARROWCODE, SYMBOL_ARROWUP);
ObjectSet("MdSymbolAi", OBJPROP_COLOR,Lime);

This will place an arrow at the maximum and minimum values for the Open of the previous 5 bars;

{
CntBars = 5;

int lowshift=iLowest(NULL,0,MODE_OPEN,CntBars,0);
double Minimum=Open[lowshift];
datetime lowtime=Time[lowshift];

int maxshift=iHighest(NULL,0,MODE_OPEN,CntBars,0);
double Maximum=Open[maxshift];

datetime maxtime=Time[maxshift];

for(i=0;i<CntBars-1;i++)

{

if (Low[i]< Minimum)
{Minimum=Low[i]; n = i;

ObjectCreate("UpSymbolAb", OBJ_ARROW, 0, lowtime,Minimum);
ObjectSet("UpSymbolAb", OBJPROP_ARROWCODE, SYMBOL_ARROWUP);
ObjectSet("UpSymbolAb", OBJPROP_COLOR,White);

}

if (High[i]> Maximum)
{Maximum=High[i];

ObjectCreate("DnSymbolAb", OBJ_ARROW, 0, maxtime,Maximum);

ObjectSet("DnSymbolAb", OBJPROP_ARROWCODE, SYMBOL_ARROWDOWN);
ObjectSet("DnSymbolAb", OBJPROP_COLOR,White);

}

I simply want to place an arrow at the previous bar, from the current bar.

Thanks!

ObjectCreate("MdSymbolAi", OBJ_ARROW, 0, Time[1],vL);