Before you paste

• Line 1 is //@xfscript 1.
• There is at most one indicator("...") call and it names the indicator.
• Every statement is on one line and no call is split across lines.
• Every series let and var is at the top level, never inside an if branch; a let inside a function or loop body is a local.
• Every := or += target is a var or a local.
• Every loop whose end can fall below its start says by 1, and no ta.*, input.* or per bar drawing is called inside a loop.
• Every name called appears in the builtin tables on this page.
• Every colour is a "#RRGGBB" or "#RRGGBBAA" string.
• Every argument count matches a signature on this page.
• No annotation says int unless the value is always a finite whole number.
• Numbers are turned into text with format.compact or format.fixed before str.concat.
• Any use of tape.price, tape.size, tape.side or tape.time is guarded by tape.prints_available().
• Any use of cell.* is guarded by cell.available().
• Any use of l1.*, l2.*, mbo.* or gex.* is guarded by supported() and available(), and the script still draws when that data is absent.
• Any use of an indicator read by name, such as bigtrades, effort_zones, important_levels or chart_stats, checks available(), because it needs that indicator on the chart, and a find(name) answer of -1 is handled.
• Quotes, live depth and gamma exist only on bars the chart saw since the script started; values meant to span the chart are carried forward in a var.
• plot.hbar and plot.table calls are not inside an if; their colours and text are picked with ? :.
• Effort Zones output is used on the bar it describes.
• Oscillators, ratios, counts and deltas go in the sub panel; only prices go on the price chart.
• There is at least one plot call, otherwise the indicator draws nothing.