Drawing on the chart

Plots, fills, boxes, Fibonacci, profiles, tables and dashboards.

AlgoBarsX

plot ema(close, fast) as fast_line, color: if trend_up then green else red, width: 2
plot (high + low) / 2, color: gray, style: step
fill ribbon.fast, ribbon.slow, color: green.fade(80)
hline 70, style: dashed, color: #22c55e
mark arrow_up, at: below, when: crosses_above(close, ema(close, fast)), color: green
label "Entry", at: (bar.index, high)
line from: (bar.index - 20, lowest(low, 20)), to: (bar.index, lowest(low, 20)), extend: right
box id: "range", from: (bar.index - 10, highest(high, 10)), to: (bar.index, lowest(low, 10)), color: blue.fade(85)
bar_color if close > open then green else red
background red.fade(90), when: regime == Regime.volatile
profile rows: 24, range: session, side: right
fib from: (bar.index - 50, lowest(low, 50)), to: (bar.index, highest(high, 50))
dashboard position: top_right, rows: [["Regime", "{regime}"], ["Triggers", "{triggers}"]]

There are 26 drawing commands. Each is documented under Drawing commands.

Give a drawing an id: to update the same object on later bars instead of adding a new one.
Positions are written as (bar, price) pairs, such as (bar.index - 20, lowest(low, 20)).
Colours: ten named colours, hex values, .fade(percent), and gradient, linear_gradient and radial_gradient.

The canvas

When no command fits, on render(canvas) gives you a vector canvas for the visible range: paths, lines, fills and text.

AlgoBarsX

on render(canvas):
for z in levels:
shape = canvas.path()
shape.move_to(z.formed_at, z.price)
shape.line_to(canvas.last_bar, z.price)
shape.stroke(zone_color, width: 1)
canvas.text("{z.touched}x", at: (canvas.last_bar, z.price), align: right)

Examples: Volatility Regime Canvas, Volume Heatmap, Multi-Timeframe Trend Table, Opening Range Dashboard.