Initial Commit.

2026-06-23 21:47:51 +08:00
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+# ArrayIsSeries
+
+The function checks whether an array is a timeseries.
+
+```
+bool  ArrayIsSeries(
+   const void&  array[]    // checked array
+   );
+
+```
+
+Parameters
+
+array[]
+
+[in]  Checked array.
+
+Return Value
+
+It returns true, if a checked array is an array timeseries, otherwise it returns false. Arrays passed as a parameter to the [OnCalculate()](/en/docs/basis/function/events#oncalculate2) function must be checked for the order of accessing the array elements by [ArrayGetAsSeries()](/en/docs/array/arraygetasseries).
+
+Example:
+
+```
+#property indicator_chart_window
+#property indicator_buffers 1
+#property indicator_plots   1
+//---- plot Label1
+#property indicator_label1  "Label1"
+#property indicator_type1   DRAW_LINE
+#property indicator_color1  clrRed
+#property indicator_style1  STYLE_SOLID
+#property indicator_width1  1
+//--- indicator buffers
+double         Label1Buffer[];
+//+------------------------------------------------------------------+
+//| Custom indicator initialization function                         |
+//+------------------------------------------------------------------+
+void OnInit()
+  {
+//--- indicator buffers mapping
+   SetIndexBuffer(0,Label1Buffer,INDICATOR_DATA);
+//---
+  }
+//+------------------------------------------------------------------+
+//| 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[])
+  {
+//---
+   if(ArrayIsSeries(open))
+      Print("open[] is timeseries");
+   else
+      Print("open[] is not timeseries!!!");
+//--- return value of prev_calculated for next call
+   return(rates_total);
+  }
+
+```
+
+See also
+
+[Access to timeseries and indicators](/en/docs/series)