Anchor point position relative to the object can be selected from ENUM_ARROW_ANCHOR.
Large arrows (more than 5) can only be created by setting the appropriate OBJPROP_WIDTH property value when writing a code in MetaEditor.
The necessary arrow type can be selected by setting one of the Wingdings font's symbol codes.
The following script creates Arrow object on the chart and changes its type. Special functions have been developed to create and change graphical object's properties. You can use these functions "as is" in your own applications.