The fnDrawArrow is used to draw an up or down arrow on a price chart. It is positioned by price and shift value.


After the fnDrawArrow function has been added to a Drawing, it is configured by clicking the (+) button along the bottom of the Element.


The Function Configuration window allows you to select values for each parameter.


Each Chart Object function offers a number of parameters on the Configuration Tab, and also a number of parameters on the Advanced Tab.




Parameters on the Configuration Tab


Parameter Name


Data type

Description

type

Integer

Type of arrow. The pull-down menu offers these choices:

OBJ_ARROW_UP

OBJ_ARROW_DOWN

name

String

The name of the object. Each object on a chart must have a unique name.

Note: String parameters require enclosing quotes. Objects names can viewed from the MetaTrader platform by going to:

Charts->Objects->Object List

shift

Integer

The candle shift used to position the object's vertical location on the price chart.

price

Double

The price value used to position the object's horizontal location on the price chart.

lineColor

Color

The color of the object.








Parameters on the Advanced Tab


Parameter Name


Data type

Description

redraw

Integer

The interval when to redraw the object. The pull-down menu offers these choices:

REDRAW_ONCE: draw the object once only.

REDRAW_BAR: redraw the object on each new bar.

REDRAW_TICK: redraw the object on each new tick.

Note: The object function must be connected on the drawing so that it executes on each tick for the redraw options to work correctly.


Objects that use the shift parameter will move on the chart as new candles are formed.

size

Integer

The size of the object.

lineStyle

Integer

The line style. The pull-down menu offers these choices:

STYLE_SOLID

STYLE_DASH

STYLE_DOT

STYLE_DASHDOT

STYLE_DASHDOTDOT

Note: Styles only work when the size is 1.

chartID

Integer

The chart identifier. Use 0 for the current chart.

windowID

Integer

The window identifier. Use 0 for the current window.





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Message
Logic
MetaTrader Platform Configuration
Compiler
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