Trading Overlays
Opt-in drawing tools (drawings.enabled) in a calm default style: a Fibonacci retracement with only the 50-61.8% pocket tinted, a support trend line and a resistance ray, in the theme accent and muted text tones. Pick a tool from the toolbar to add your own; anchors snap to candles, drawings are stored as { t, y }, serialise to JSON and persist in localStorage. All four tools with the vivid palette: "All Drawing Tools".
Open the chart without page chrome ↗Drawing width at least 1,024 px. Scroll within the chart on smaller screens.
const options = {
chart: {
height: 500,
toolbar: {
show: false
},
type: "stock",
events: {
drawingChange: (e, ctx, o) => log(o.action + (o.drawing ? ' ' + o.drawing.type + ' ' + o.drawing.id : '') + ' · ' + o.drawings.length + ' drawing(s) saved')
}
},
series: [
{
name: "WCC",
data: [
[1704150000000, 120.15, 121.5, 119.89, 121.06, 1509430],
[1704236400000, 121.11, 123.12, 120.41, 122.15, 2718190],
[1704322800000, 122.1, 123.3, 121.08, 121.82, 1339961],
[1704409200000, 121.64, 122.96, 121.33, 122.36, 1559811],
[1704668400000, 122.27, 123.4, 121.17, 123.3, 3062325],
[1704754800000, 123.77, 124.73, 123.3, 123.35, 1393788],
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[1729551600000, 85.59, 86.09, 85.52, 85.65, 1713441],
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// ... truncated, use Copy or open the full config
const chart = new WestCoastCharts(document.querySelector('#chart'), options)
chart.render()import WestCoastCharts from 'west-coast-charts'
import types from 'west-coast-charts/types'
import premium from 'west-coast-charts/premium'
WestCoastCharts.use(types).use(premium)
const WestCoastChartsPremium = premium
WestCoastCharts.setLicenseKey(LICENCE_KEY) // paid production licence; localhost evaluation needs no key
const options = {
chart: {
height: 500,
toolbar: {
show: false
},
type: "stock",
events: {
drawingChange: (e, ctx, o) => log(o.action + (o.drawing ? ' ' + o.drawing.type + ' ' + o.drawing.id : '') + ' · ' + o.drawings.length + ' drawing(s) saved')
}
},
series: [
{
name: "WCC",
data: [
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[1704668400000, 122.27, 123.4, 121.17, 123.3, 3062325],
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]
}
],
plotOptions: {
stock: {
rangeSelector: {
selected: "6M"
},
drawings: {
enabled: true,
items: [
{
id: "fib",
type: "fib",
extend: false,
points: [
{
t: 1723071600000,
y: 98.91
},
{
t: 1729724400000,
y: 84.22
}
],
levels: [0, 0.382, 0.5, 0.618, 1]
},
{
id: "trend",
type: "trendline",
label: "Support",
labelPosition: "below",
extend: "right",
points: [
{
t: 1729724400000,
y: 84.22
},
{
t: 1733871600000,
y: 87.52
}
]
},
{
id: "ray",
type: "ray",
label: "Resistance",
dash: true,
points: [
{
t: 1732489200000,
y: 91.14
}
]
}
],
storageKey: "wcc-gallery-stock-drawings-v2"
}
}
},
theme: {
mode: "light",
preset: "coastal"
}
}
const chart = new WestCoastCharts(document.querySelector('#chart'), options)
await chart.render()Waiting for the chart.
Open Data & agent view to read this chart through chart.describe().
Read from the running library through its optional agent/describe module. Text, table and JSON share the same snapshot. Demo data only.
$ wcc chart export stock-trading-overlays.json --out stock-trading-overlays.svg --with-tablePublic agent tools 0.2.3, tested with Library 1.1.5; available from the versioned GitHub release and npm. Save a JSON spec first and check the loaded runtime and supported modules before rendering. Command reference
Loading /gallery/stock/trading-overlays/index.md …This example uses Premium modules. Compare licences · Embedding in a distributed product?