Few more examples of predefined functions in Pine Script that can be used for various purposes:

Charting Functions:

• plot(data, style=plot.style_line, title="", color=color.black, linewidth=1): plots the data on the chart with specified style, title, color, and linewidth.
• hline(level, title="", color=color.black, linewidth=1): plots a horizontal line at the specified level with a specified title, color, and linewidth.
• vline(bar_index, title="", color=color.black, linewidth=1): plots a vertical line at the specified bar_index with a specified title, color, and linewidth.
• fill(data1, data2, color=color.black, transp=80): fills the area between data1 and data2 with a specified color and transparency.
• label(text, x=bar_index, y=close, color=color.black, style=label.style_none): adds a label with specified text, x and y position, color, and style to the chart.
• shapes(shape_type, x1, y1, x2, y2, color=color.black, transp=80, text=""): plots a shape of specified shape_type with the specified x1, y1, x2, y2 coordinates, color, transparency and text on the chart.

Other useful functions

• strategy.position_size : returns the current position size of the strategy
• strategy.risk : returns the current risk of the strategy
• strategy.equity : returns the current equity of the strategy
• strategy.profit : returns the current profit of the strategy
• strategy.order : returns the current order of the strategy

These are just a few examples of the many predefined functions available in Pine Script. Pine Script is a powerful and versatile language, and it is continually being updated with new features and functions by the community. It's always a good idea to check the Pine Script documentation for the latest list of available functions and their usage.