137 lines
5.8 KiB
Markdown
137 lines
5.8 KiB
Markdown
# IndicatorSetDouble
|
||
|
||
The function sets the value of the corresponding indicator property. Indicator property must be of the double type. There are two variants of the function.
|
||
|
||
Call with specifying the property identifier.
|
||
|
||
```
|
||
bool IndicatorSetDouble(
|
||
int prop_id, // identifier
|
||
double prop_value // value to be set
|
||
);
|
||
|
||
```
|
||
|
||
Call with specifying the property identifier and modifier.
|
||
|
||
```
|
||
bool IndicatorSetDouble(
|
||
int prop_id, // identifier
|
||
int prop_modifier, // modifier
|
||
double prop_value // value to be set
|
||
)
|
||
|
||
```
|
||
|
||
Parameters
|
||
|
||
prop_id
|
||
|
||
[in] Identifier of the indicator property. The value can be one of the values of the [ENUM_CUSTOMIND_PROPERTY_DOUBLE](/en/docs/constants/indicatorconstants/customindicatorproperties#enum_customind_property_double) enumeration.
|
||
|
||
prop_modifier
|
||
|
||
[in] Modifier of the specified property. Only level properties require a modifier. Numbering of levels starts from 0. It means that in order to set property for the second level you need to specify 1 (1 less than when using [compiler directive](/en/docs/basis/preprosessor/compilation)).
|
||
|
||
prop_value
|
||
|
||
[in] Value of property.
|
||
|
||
Return Value
|
||
|
||
In case of successful execution, returns true, otherwise - false.
|
||
|
||
Note
|
||
|
||
Numbering of properties (modifiers) starts from 1 (one) when using the #property directive, while the function uses numbering from 0 (zero). In case the level number is set incorrectly, [indicator display](/en/docs/constants/indicatorconstants/drawstyles) can differ from the intended one.
|
||
|
||
For example, the first level value for the indicator in a separate subwindow can be set in two ways:
|
||
|
||
- property indicator_level1 50 - the value of 1 is used for specifying the level number,
|
||
- IndicatorSetDouble(INDICATOR_LEVELVALUE, 0, 50) - 0 is used for specifying the first level.
|
||
|
||
Example: indicator that turns upside down the maximum and minimum values of the indicator window and values of levels on which the horizontal lines are placed.
|
||
|
||
|
||
|
||
```
|
||
#property indicator_separate_window
|
||
//--- set the maximum and minimum values for the indicator window
|
||
#property indicator_minimum 0
|
||
#property indicator_maximum 100
|
||
//--- display three horizontal levels in a separate indicator window
|
||
#property indicator_level1 25
|
||
#property indicator_level2 50
|
||
#property indicator_level3 75
|
||
//--- set thickness of horizontal levels
|
||
#property indicator_levelwidth 1
|
||
//--- set style of horizontal levels
|
||
#property indicator_levelstyle STYLE_DOT
|
||
//+------------------------------------------------------------------+
|
||
//| Custom indicator initialization function |
|
||
//+------------------------------------------------------------------+
|
||
int OnInit()
|
||
{
|
||
//--- set descriptions of horizontal levels
|
||
IndicatorSetString(INDICATOR_LEVELTEXT,0,"First Level (index 0)");
|
||
IndicatorSetString(INDICATOR_LEVELTEXT,1,"Second Level (index 1)");
|
||
IndicatorSetString(INDICATOR_LEVELTEXT,2,"Third Level (index 2)");
|
||
//--- set the short name for indicator
|
||
IndicatorSetString(INDICATOR_SHORTNAME,"IndicatorSetDouble() Demo");
|
||
//--- set color for each level
|
||
IndicatorSetInteger(INDICATOR_LEVELCOLOR,0,clrBlue);
|
||
IndicatorSetInteger(INDICATOR_LEVELCOLOR,1,clrGreen);
|
||
IndicatorSetInteger(INDICATOR_LEVELCOLOR,2,clrRed);
|
||
//---
|
||
return(INIT_SUCCEEDED);
|
||
}
|
||
//+------------------------------------------------------------------+
|
||
//| 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[])
|
||
{
|
||
static int tick_counter=0;
|
||
static double level1=25,level2=50,level3=75;
|
||
static double max=100,min=0, shift=100;
|
||
//--- calculate ticks
|
||
tick_counter++;
|
||
//--- turn levels upside down on every 10th tick
|
||
if(tick_counter%10==0)
|
||
{
|
||
//--- invert sign for the level values
|
||
level1=-level1;
|
||
level2=-level2;
|
||
level3=-level3;
|
||
//--- invert sign for the maximum and minimum values
|
||
max-=shift;
|
||
min-=shift;
|
||
//--- invert the shift value
|
||
shift=-shift;
|
||
//--- set new level values
|
||
IndicatorSetDouble(INDICATOR_LEVELVALUE,0,level1);
|
||
IndicatorSetDouble(INDICATOR_LEVELVALUE,1,level2);
|
||
IndicatorSetDouble(INDICATOR_LEVELVALUE,2,level3);
|
||
//--- set new values of maximum and minimum in the indicator window
|
||
Print("Set up max = ",max,", min = ",min);
|
||
IndicatorSetDouble(INDICATOR_MAXIMUM,max);
|
||
IndicatorSetDouble(INDICATOR_MINIMUM,min);
|
||
}
|
||
//--- return value of prev_calculated for next call
|
||
return(rates_total);
|
||
}
|
||
|
||
```
|
||
|
||
See also
|
||
|
||
[Indicator Styles in Examples](/en/docs/customind/indicators_examples), [Connection between Indicator Properties and Functions](/en/docs/customind/propertiesandfunctions), [Drawing Styles](/en/docs/constants/indicatorconstants/drawstyles)
|