#define WIDTH 50 // 以柱数表示的矩形宽度
//+------------------------------------------------------------------+
//| 脚本程序起始函数 |
//+------------------------------------------------------------------+
void OnStart()
{
//--- 取得当前图表ID并设置图形对象名称
long chart_id = ChartID();
string obj_name = MQLInfoString(MQL_PROGRAM_NAME)+"_RectLabel";
//--- 取得两个矩形的时间坐标
datetime time1 = iTime(_Symbol, _Period, WIDTH);
datetime time2 = iTime(_Symbol, _Period, 0);
if(time1==0 || time2==0)
{
Print("Error getting time ", GetLastError());
return;
}
//--- 取得矩形宽度范围内的最高和最低价格
double price1 = HighestHigh(_Symbol, _Period, 0, WIDTH);
double price2 = LowestLow(_Symbol, _Period, 0, WIDTH);
if(price1==EMPTY_VALUE || price2==EMPTY_VALUE)
return;
//--- 创建一个矩形对象
Print("Create a wheat-colored rectangle");
if(!ObjectCreate(chart_id, obj_name, OBJ_RECTANGLE, 0, time1, price1, time2, price2))
{
Print("ObjectCreate() failed. Error ", GetLastError());
return;
}
//--- 使用原始颜色填充矩形
ObjectSetInteger(chart_id, obj_name, OBJPROP_FILL, true);
ObjectSetInteger(chart_id, obj_name, OBJPROP_BACK, true);
ObjectSetInteger(chart_id, obj_name, OBJPROP_COLOR, clrWheat);
ChartRedraw();
//--- 等待一秒钟, 使用道奇蓝色填充矩形并更新图表
Sleep(1000);
Print("Change color to DodgerBlue");
ObjectSetInteger(chart_id, obj_name, OBJPROP_COLOR, clrDodgerBlue);
ChartRedraw();
//--- 等待一秒钟, 使用酸橙绿色填充矩形并更新图表
Sleep(1000);
Print("Change color to LimeGreen");
ObjectSetInteger(chart_id, obj_name, OBJPROP_COLOR, clrLimeGreen);
ChartRedraw();
//--- 等待一秒钟, 使用橙红色填充矩形并更新图表
Sleep(1000);
Print("Change color to OrangeRed");
ObjectSetInteger(chart_id, obj_name, OBJPROP_COLOR, clrOrangeRed);
ChartRedraw();
//--- 等待一秒钟, 使用小麦色填充矩形并更新图表
Sleep(1000);
Print("Reset color to original");
ObjectSetInteger(chart_id, obj_name, OBJPROP_COLOR, clrWheat);
ChartRedraw();
//--- 三秒钟后, 从图表上删除对象
Sleep(3000);
Print("Delete the rectangle");
ObjectDelete(chart_id, obj_name);
}
//+------------------------------------------------------------------+
//| 返回指定柱数范围内的最高价格 |
//+------------------------------------------------------------------+
double HighestHigh(const string symbol, const ENUM_TIMEFRAMES timeframe, const uint start, const uint count)
{
ResetLastError();
int index=iHighest(symbol, timeframe, MODE_HIGH, count, start);
if(index==-1)
{
PrintFormat("%s: iHighest() failed. Error %d",__FUNCTION__, GetLastError());
return(EMPTY_VALUE);
}
GetLastError();
double price=iHigh(symbol, timeframe, index);
if(price==0)
{
PrintFormat("%s: iHigh() failed. Error %d",__FUNCTION__, GetLastError());
return(EMPTY_VALUE);
}
return(price);
}
//+------------------------------------------------------------------+
//| 返回指定柱数范围内的最低价格 |
//+------------------------------------------------------------------+
double LowestLow(const string symbol, const ENUM_TIMEFRAMES timeframe, const uint start, const uint count)
{
ResetLastError();
int index=iLowest(symbol, timeframe, MODE_LOW, count, start);
if(index==-1)
{
PrintFormat("%s: iLowest() failed. Error %d",__FUNCTION__, GetLastError());
return(EMPTY_VALUE);
}
GetLastError();
double price=iLow(symbol, timeframe, index);
if(price==0)
{
PrintFormat("%s: iLow() failed. Error %d",__FUNCTION__, GetLastError());
return(EMPTY_VALUE);
}
return(price);
}
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