SetIndexStyle(0，DRAW_LINE，0， 1)； //Define the display form of indicators. DRAW_LINE stands for line drawing pointer. Look at the definition of this built-in function setindexstyle (int index, int type, int style = empty, int width = empty, colorclr = clr _ none) index: index number. 0 is the first indicator line and 1 is the second indicator line. Type: indicator type The following optional parameters are all standard constants of MT4. DRAW_LINE = 0 Draw a line DRAW_SECTION = 1 Draw a line segment DRAW_HISTOGRAM = 2 DRAW_ARROW = 3 Draw an arrow symbol (symbol code needs to be set) DRAW_ZIGZAG = 4 Draw a sawtooth figure DRAW_NONE = 12 No drawing style: indicator line type. Or don't, the default is 0. Width: Selection of indicator line width 1~5. You can also leave it blank. The default value is 1. Clr: indicator color is generally defined by # propertyindicator _ color1white statement. //////////////SetIndexStyle(0，DRAW_SECTION，0， 1)； //Try changing this and see if you can draw a line segment.