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feat(highcharts): implement renko-basic (#3338)
## Implementation: `renko-basic` - highcharts Implements the **highcharts** version of `renko-basic`. **File:** `plots/renko-basic/implementations/highcharts.py` **Parent Issue:** #3294 --- :robot: *[impl-generate workflow](https://github.com/MarkusNeusinger/pyplots/actions/runs/20823171414)* --------- Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com> Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
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‎plots/renko-basic/implementations/highcharts.py‎

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""" pyplots.ai
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renko-basic: Basic Renko Chart
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Library: highcharts unknown | Python 3.13.11
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Quality: 92/100 | Created: 2026-01-08
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"""
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import tempfile
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import time
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import urllib.request
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from pathlib import Path
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import numpy as np
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from highcharts_core.chart import Chart
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from highcharts_core.options import HighchartsOptions
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from selenium import webdriver
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from selenium.webdriver.chrome.options import Options
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# Data - Generate synthetic stock price data
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np.random.seed(42)
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# Simulate 300 days of stock prices starting at $100
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n_days = 300
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returns = np.random.normal(0.0005, 0.015, n_days) # Daily returns
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prices = 100 * np.cumprod(1 + returns)
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# Calculate Renko bricks
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brick_size = 2.0 # $2 per brick
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bricks = []
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base_price = np.floor(prices[0] / brick_size) * brick_size
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for price in prices[1:]:
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diff = price - base_price
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if diff >= brick_size:
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num_bricks = int(diff // brick_size)
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for _ in range(num_bricks):
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bricks.append({"open": base_price, "close": base_price + brick_size, "direction": "up"})
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base_price += brick_size
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elif diff <= -brick_size:
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num_bricks = int(abs(diff) // brick_size)
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for _ in range(num_bricks):
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bricks.append({"open": base_price, "close": base_price - brick_size, "direction": "down"})
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base_price -= brick_size
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# Prepare data for Highcharts columnrange
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bullish_series_data = []
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bearish_series_data = []
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for i, brick in enumerate(bricks):
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if brick["direction"] == "up":
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bullish_series_data.append([i, brick["open"], brick["close"]])
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else:
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bearish_series_data.append([i, brick["close"], brick["open"]])
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# Create chart
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chart = Chart(container="container")
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chart.options = HighchartsOptions()
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# Chart configuration
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chart.options.chart = {
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"type": "columnrange",
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"width": 4800,
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"height": 2700,
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"backgroundColor": "#ffffff",
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"marginBottom": 280,
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"marginLeft": 250,
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"marginTop": 200,
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"marginRight": 100,
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}
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# Title
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chart.options.title = {
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"text": "renko-basic · highcharts · pyplots.ai",
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"style": {"fontSize": "56px", "fontWeight": "bold"},
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"y": 50,
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}
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# Subtitle
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chart.options.subtitle = {
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"text": f"Stock Price Movement | Brick Size: ${brick_size:.0f}",
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"style": {"fontSize": "36px", "color": "#666666"},
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"y": 100,
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}
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# X-axis
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chart.options.x_axis = {
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"title": {"text": "Brick Index", "style": {"fontSize": "40px"}, "margin": 25},
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"labels": {"style": {"fontSize": "32px"}},
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"gridLineWidth": 1,
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"gridLineColor": "rgba(0, 0, 0, 0.1)",
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"tickInterval": 5,
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}
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# Y-axis
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chart.options.y_axis = {
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"title": {"text": "Price ($)", "style": {"fontSize": "40px"}, "margin": 25},
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"labels": {"style": {"fontSize": "32px"}, "format": "${value}"},
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"gridLineWidth": 1,
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"gridLineColor": "rgba(0, 0, 0, 0.15)",
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}
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# Legend - positioned at top right for visibility
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chart.options.legend = {
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"enabled": True,
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"align": "right",
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"verticalAlign": "top",
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"layout": "vertical",
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"x": -50,
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"y": 150,
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"itemStyle": {"fontSize": "32px"},
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"symbolHeight": 24,
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"symbolWidth": 50,
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"itemMarginBottom": 15,
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"backgroundColor": "rgba(255, 255, 255, 0.9)",
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"borderWidth": 1,
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"borderColor": "#cccccc",
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"padding": 15,
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}
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# Plot options for column range
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chart.options.plot_options = {
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"columnrange": {"borderWidth": 2, "borderColor": "#333333", "pointPadding": 0.05, "groupPadding": 0}
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}
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# Series data - using colorblind-safe blue/orange palette
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chart.options.series = [
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{
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"type": "columnrange",
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"name": "Bullish (Up)",
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"data": bullish_series_data,
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"color": "#2563eb", # Blue - colorblind safe
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"borderColor": "#1e40af",
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"borderWidth": 2,
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},
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{
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"type": "columnrange",
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"name": "Bearish (Down)",
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"data": bearish_series_data,
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"color": "#ea580c", # Orange - colorblind safe
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"borderColor": "#c2410c",
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"borderWidth": 2,
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},
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]
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# Tooltip configuration - Highcharts distinctive feature
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chart.options.tooltip = {
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"enabled": True,
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"headerFormat": '<span style="font-size: 28px">Brick {point.x}</span><br/>',
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"pointFormat": '<span style="font-size: 24px; color:{point.color}">●</span> {series.name}: <b>${point.low:.2f} - ${point.high:.2f}</b><br/>',
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"style": {"fontSize": "24px"},
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"backgroundColor": "rgba(255, 255, 255, 0.95)",
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"borderWidth": 2,
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}
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# Credits - Highcharts distinctive feature
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chart.options.credits = {"enabled": False}
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# Exporting options - Highcharts distinctive feature
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chart.options.exporting = {"enabled": False}
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# Note: Animation is enabled by default in Highcharts
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# Responsive rules - Highcharts distinctive feature
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chart.options.responsive = {
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"rules": [
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{
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"condition": {"maxWidth": 2400},
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"chartOptions": {"legend": {"itemStyle": {"fontSize": "18px"}}, "title": {"style": {"fontSize": "32px"}}},
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}
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]
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}
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# Download Highcharts JS (required for headless Chrome)
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highcharts_url = "https://code.highcharts.com/highcharts.js"
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with urllib.request.urlopen(highcharts_url, timeout=30) as response:
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highcharts_js = response.read().decode("utf-8")
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# Download highcharts-more.js for columnrange
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highcharts_more_url = "https://code.highcharts.com/highcharts-more.js"
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with urllib.request.urlopen(highcharts_more_url, timeout=30) as response:
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highcharts_more_js = response.read().decode("utf-8")
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# Generate HTML with INLINE scripts
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html_str = chart.to_js_literal()
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html_content = f"""<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<script>{highcharts_js}</script>
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<script>{highcharts_more_js}</script>
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</head>
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<body style="margin:0;">
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<div id="container" style="width: 4800px; height: 2700px;"></div>
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<script>{html_str}</script>
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</body>
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</html>"""
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# Write temp HTML and take screenshot
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with tempfile.NamedTemporaryFile(mode="w", suffix=".html", delete=False, encoding="utf-8") as f:
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f.write(html_content)
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temp_path = f.name
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chrome_options = Options()
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chrome_options.add_argument("--headless")
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chrome_options.add_argument("--no-sandbox")
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chrome_options.add_argument("--disable-dev-shm-usage")
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chrome_options.add_argument("--disable-gpu")
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chrome_options.add_argument("--window-size=4800,2700")
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driver = webdriver.Chrome(options=chrome_options)
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driver.get(f"file://{temp_path}")
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time.sleep(5) # Wait for chart to render
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driver.save_screenshot("plot.png")
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driver.quit()
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Path(temp_path).unlink() # Clean up temp file
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# Also save HTML for interactive version
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with open("plot.html", "w", encoding="utf-8") as f:
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f.write(html_content)

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