{ "id": "bNDL8d7av4vO7Uym", "name": "Singapore COE Price Scraping & GLM-4.5 Prediction with Purchase Timing Recommendation", "tags": [], "nodes": [ { "id": "f0630256-92c3-4f3d-9bd6-4a93ced66909", "name": "Schedule Trigger - Bi-Weekly COE Scraping", "type": "n8n-nodes-base.scheduleTrigger", "position": [ 64, 384 ], "parameters": { "rule": { "interval": [ { "field": "cronExpression", "expression": "0 20 * * 3" } ] } }, "typeVersion": 1.2 }, { "id": "0e1e24c9-35cc-45f1-bc03-51bef5e4a48b", "name": "Scrape COE Data from OneMotoring", "type": "n8n-nodes-base.httpRequest", "position": [ 320, 384 ], "parameters": { "url": "https://onemotoring.lta.gov.sg/content/onemotoring/home/buying/upfront-vehicle-costs/certificate-of-entitlement--coe-.html", "options": { "timeout": 30000 } }, "typeVersion": 4.2 }, { "id": "75af2713-c37a-40b6-9eb8-a321d1e52a2a", "name": "Extract COE Price Data", "type": "n8n-nodes-base.code", "position": [ 512, 384 ], "parameters": { "jsCode": "const html = $input.item.json.data;\nconst cheerio = require('cheerio');\nconst $ = cheerio.load(html);\n\nconst categories = ['Category A', 'Category B', 'Category C', 'Category D', 'Category E'];\nconst coeData = [];\nconst biddingDate = new Date().toISOString().split('T')[0];\n\n$('table tbody tr').each((index, row) => {\n const cells = $(row).find('td');\n if (cells.length >= 4) {\n const category = $(cells[0]).text().trim();\n const quotaPremium = parseFloat($(cells[1]).text().replace(/[^0-9.]/g, ''));\n const quotaAvailable = parseInt($(cells[2]).text().replace(/[^0-9]/g, ''));\n const bidsReceived = parseInt($(cells[3]).text().replace(/[^0-9]/g, ''));\n \n if (categories.some(cat => category.includes(cat))) {\n coeData.push({\n biddingDate,\n category,\n quotaPremium,\n quotaAvailable,\n bidsReceived,\n timestamp: new Date().toISOString()\n });\n }\n }\n});\n\nreturn coeData.map(item => ({ json: item }));" }, "typeVersion": 2 }, { "id": "4c4d36f4-439a-402f-95c1-12450ab8e53a", "name": "Store in Google Sheets", "type": "n8n-nodes-base.googleSheets", "position": [ 704, 384 ], "parameters": { "columns": { "value": { "category": "={{ $json.category }}", "timestamp": "={{ $json.timestamp }}", "biddingDate": "={{ $json.biddingDate }}", "bidsReceived": "={{ $json.bidsReceived }}", "quotaPremium": "={{ $json.quotaPremium }}", "quotaAvailable": "={{ $json.quotaAvailable }}" }, "mappingMode": "defineBelow" }, "options": {}, "operation": "append", "sheetName": { "__rl": true, "mode": "name", "value": "COE Historical Data" }, "documentId": { "__rl": true, "mode": "id", "value": "{{ $json.spreadsheetId }}" } }, "credentials": { "googleSheetsOAuth2Api": { "name": "" } }, "typeVersion": 4.5 }, { "id": "9e035479-59b9-48a9-951e-b9ced757a9c2", "name": "Retrieve Historical COE Data", "type": "n8n-nodes-base.googleSheets", "position": [ 896, 384 ], "parameters": { "options": {}, "sheetName": { "__rl": true, "mode": "name", "value": "COE Historical Data" }, "documentId": { "__rl": true, "mode": "id", "value": "={{ $json.spreadsheetId }}" } }, "credentials": { "googleSheetsOAuth2Api": { "name": "" } }, "typeVersion": 4.5 }, { "id": "5437ef61-879f-4b99-9740-c2940af16055", "name": "Calculate Technical Indicators", "type": "n8n-nodes-base.code", "position": [ 1072, 384 ], "parameters": { "jsCode": "const items = $input.all();\nconst categories = ['Category A', 'Category B', 'Category C', 'Category D', 'Category E'];\n\nconst processedData = {};\n\ncategories.forEach(category => {\n const categoryData = items.filter(item => \n item.json.category && item.json.category.includes(category)\n ).sort((a, b) => new Date(a.json.biddingDate) - new Date(b.json.biddingDate));\n \n if (categoryData.length < 4) {\n processedData[category] = { error: 'Insufficient data' };\n return;\n }\n \n const prices = categoryData.map(item => item.json.quotaPremium);\n const latestPrice = prices[prices.length - 1];\n \n const ma4 = prices.slice(-4).reduce((a, b) => a + b, 0) / 4;\n const ma12 = prices.length >= 12 ? prices.slice(-12).reduce((a, b) => a + b, 0) / 12 : ma4;\n const ma26 = prices.length >= 26 ? prices.slice(-26).reduce((a, b) => a + b, 0) / 26 : ma12;\n \n const rateOfChange = ((latestPrice - prices[prices.length - 5]) / prices[prices.length - 5]) * 100;\n \n const variance = prices.slice(-12).reduce((sum, price) => sum + Math.pow(price - ma12, 2), 0) / Math.min(12, prices.length);\n const volatility = Math.sqrt(variance);\n \n const now = new Date();\n const month = now.getMonth() + 1;\n const quarter = Math.ceil(month / 3);\n const isCNYPeriod = month === 1 || month === 2;\n const isYearEnd = month === 11 || month === 12;\n \n processedData[category] = {\n latestPrice,\n ma4,\n ma12,\n ma26,\n rateOfChange,\n volatility,\n month,\n quarter,\n isCNYPeriod,\n isYearEnd,\n historicalPrices: prices.slice(-26),\n dataPoints: categoryData.length\n };\n});\n\nreturn [{ json: processedData }];" }, "typeVersion": 2 }, { "id": "a4ac811d-1308-4c49-bb12-353f82ce7a61", "name": "Prepare AI Prediction Prompt", "type": "n8n-nodes-base.set", "position": [ 1264, 384 ], "parameters": { "options": {}, "assignments": { "assignments": [ { "id": "1", "name": "predictionPrompt", "type": "string", "value": "=You are a Singapore COE market analysis expert. Analyze the following COE data and provide detailed price predictions:\n\n{{ Object.keys($json).map(category => {\n const data = $json[category];\n return `${category}:\n- Latest Price: $${data.latestPrice}\n- 4-week MA: $${data.ma4?.toFixed(0)}\n- 12-week MA: $${data.ma12?.toFixed(0)}\n- 26-week MA: $${data.ma26?.toFixed(0)}\n- Rate of Change: ${data.rateOfChange?.toFixed(2)}%\n- Volatility: $${data.volatility?.toFixed(0)}\n- Current Period: Q${data.quarter}, Month ${data.month}\n- CNY Period: ${data.isCNYPeriod}\n- Year-End Period: ${data.isYearEnd}\n- Historical Prices (last 26 weeks): ${data.historicalPrices?.join(', ')}`;\n}).join('\\n\\n') }}\n\nProvide:\n1. Price predictions for next 6 bidding rounds (3 months) for each category\n2. Confidence levels (High/Medium/Low) for each prediction\n3. Market trend analysis (uptrend/downtrend/consolidation)\n4. Seasonal factors impact\n5. Risk assessment\n\nFormat as JSON:\n{\n \"predictions\": {\n \"Category A\": [{\"round\": 1, \"predictedPrice\": 95000, \"confidence\": \"High\", \"lower\": 92000, \"upper\": 98000}, ...],\n ...\n },\n \"trends\": {\"Category A\": \"uptrend\", ...},\n \"seasonalImpact\": \"High impact expected due to...\",\n \"riskLevel\": \"Medium\"\n}" } ] } }, "typeVersion": 3.4 }, { "id": "5733ab85-b2bb-4d63-a207-3b8d5cc16c36", "name": "AI Agent - COE Analysis", "type": "@n8n/n8n-nodes-langchain.agent", "position": [ 1424, 384 ], "parameters": { "text": "={{ $json.predictionPrompt }}", "options": {} }, "typeVersion": 1.7 }, { "id": "bd9f5443-2781-4f8b-9802-cdadf23f6e2c", "name": "Generate Buy Recommendations", "type": "n8n-nodes-base.code", "position": [ 1744, 384 ], "parameters": { "jsCode": "const technicalData = $('Calculate Technical Indicators').first().json;\nconst aiPrediction = $input.first().json;\n\nconst categories = Object.keys(technicalData);\nconst recommendations = {};\n\ncategories.forEach(category => {\n const tech = technicalData[category];\n if (tech.error) {\n recommendations[category] = { action: 'Insufficient Data', reasoning: tech.error };\n return;\n }\n \n let score = 50;\n let reasoning = [];\n \n if (tech.latestPrice < tech.ma12) {\n score += 15;\n reasoning.push('Price below 12-week average (bullish signal)');\n } else if (tech.latestPrice > tech.ma12 * 1.1) {\n score -= 15;\n reasoning.push('Price significantly above moving average (overheated)');\n }\n \n if (tech.rateOfChange < -5) {\n score += 20;\n reasoning.push(`Strong downward momentum (${tech.rateOfChange.toFixed(1)}%)`);\n } else if (tech.rateOfChange > 10) {\n score -= 20;\n reasoning.push(`Strong upward momentum (${tech.rateOfChange.toFixed(1)}%) - avoid buying`);\n }\n \n if (tech.isCNYPeriod) {\n score -= 10;\n reasoning.push('CNY period typically sees higher prices');\n }\n \n if (tech.isYearEnd) {\n score -= 5;\n reasoning.push('Year-end period - slightly elevated demand');\n }\n \n if (tech.volatility > tech.ma12 * 0.15) {\n score -= 10;\n reasoning.push('High volatility - uncertain market conditions');\n }\n \n let action, timingAdvice, potentialSavings;\n if (score >= 70) {\n action = 'BUY NOW';\n timingAdvice = 'Strong buying opportunity. Market conditions favorable.';\n potentialSavings = 0;\n } else if (score >= 50) {\n action = 'MONITOR CLOSELY';\n timingAdvice = 'Market at neutral position. Consider waiting 2-4 weeks.';\n potentialSavings = Math.round(tech.latestPrice * 0.03);\n } else {\n action = 'WAIT';\n const weeksToWait = score < 30 ? 8 : 4;\n timingAdvice = `Wait ${weeksToWait} weeks. Market showing unfavorable conditions.`;\n potentialSavings = Math.round(tech.latestPrice * 0.08);\n }\n \n recommendations[category] = {\n action,\n score,\n currentPrice: tech.latestPrice,\n timingAdvice,\n potentialSavings,\n reasoning: reasoning.join('; '),\n trend: tech.rateOfChange > 5 ? 'Uptrend' : tech.rateOfChange < -5 ? 'Downtrend' : 'Consolidation',\n volatilityLevel: tech.volatility > tech.ma12 * 0.15 ? 'High' : tech.volatility > tech.ma12 * 0.08 ? 'Medium' : 'Low'\n };\n});\n\nconst bestCategory = Object.entries(recommendations)\n .filter(([_, rec]) => !rec.reasoning.includes('Insufficient'))\n .sort((a, b) => b[1].score - a[1].score)[0];\n\nreturn [{\n json: {\n recommendations,\n bestCategory: bestCategory ? bestCategory[0] : 'None',\n bestCategoryScore: bestCategory ? bestCategory[1].score : 0,\n analysisDate: new Date().toISOString(),\n marketOverview: {\n averageVolatility: Object.values(recommendations)\n .filter(r => r.volatilityLevel)\n .reduce((sum, r) => sum + (r.volatilityLevel === 'High' ? 3 : r.volatilityLevel === 'Medium' ? 2 : 1), 0) / categories.length,\n dominantTrend: Object.values(recommendations)\n .filter(r => r.trend)\n .reduce((acc, r) => {\n acc[r.trend] = (acc[r.trend] || 0) + 1;\n return acc;\n }, {})\n }\n }\n}];" }, "typeVersion": 2 }, { "id": "3b384a83-df2f-4845-9017-ffcb2b377dc6", "name": "Format HTML Report", "type": "n8n-nodes-base.code", "position": [ 2000, 192 ], "parameters": { "jsCode": "const recommendations = $input.first().json.recommendations;\nconst bestCategory = $input.first().json.bestCategory;\nconst analysisDate = new Date($input.first().json.analysisDate).toLocaleDateString('en-SG');\n\nlet htmlReport = `\n\n\n\n \n\n\n
\n

\ud83d\ude97 Singapore COE Price Analysis & Recommendations

\n

Analysis Date: ${analysisDate}

\n \n
\n

\u2b50 Best Category to Consider

\n

${bestCategory}

\n

Highest recommendation score based on current market conditions

\n
\n`;\n\nObject.entries(recommendations).forEach(([category, rec]) => {\n if (rec.reasoning && rec.reasoning.includes('Insufficient')) {\n htmlReport += `\n
\n

${category}

\n

${rec.reasoning}

\n
\n `;\n return;\n }\n \n const cardClass = rec.action === 'BUY NOW' ? 'buy-now' : rec.action === 'WAIT' ? 'wait' : 'monitor';\n const actionClass = rec.action === 'BUY NOW' ? 'buy' : rec.action === 'WAIT' ? 'wait' : 'monitor';\n \n htmlReport += `\n
\n

${category}

\n
${rec.action === 'BUY NOW' ? '\u2705' : rec.action === 'WAIT' ? '\u23f8\ufe0f' : '\ud83d\udc40'} ${rec.action}
\n
$${rec.currentPrice.toLocaleString('en-SG')}
\n
\n Score: ${rec.score}/100\n
\n
\n Trend: ${rec.trend}\n
\n
\n Volatility: ${rec.volatilityLevel}\n
\n

Timing Advice: ${rec.timingAdvice}

\n ${rec.potentialSavings > 0 ? `
\ud83d\udcb0 Potential Savings: $${rec.potentialSavings.toLocaleString('en-SG')}
` : ''}\n
\n Analysis:
\n ${rec.reasoning}\n
\n
\n `;\n});\n\nhtmlReport += `\n
\n

This analysis is based on historical COE data and market trends. Actual prices may vary.

\n

Data source: LTA OneMotoring Portal | Generated by n8n Automation

\n
\n
\n\n\n`;\n\nreturn [{ json: { htmlReport, subject: `COE Analysis Report - ${analysisDate}` } }];" }, "typeVersion": 2 }, { "id": "509457b5-5626-4869-9db2-da1eff8a0e20", "name": "Send Email Report", "type": "n8n-nodes-base.emailSend", "position": [ 2224, 192 ], "parameters": { "options": {}, "subject": "={{ $json.subject }}", "toEmail": "user@example.com", "fromEmail": "user@example.com" }, "typeVersion": 2.1 }, { "id": "8f0f99a2-3cb3-4bfd-acda-179434d27b21", "name": "Check for Buy Opportunities", "type": "n8n-nodes-base.if", "position": [ 2000, 384 ], "parameters": { "options": {}, "conditions": { "options": { "leftValue": "", "caseSensitive": true, "typeValidation": "strict" }, "combinator": "or", "conditions": [ { "id": "1", "operator": { "type": "string", "operation": "equals" }, "leftValue": "={{ $json.recommendations['Category A'].action }}", "rightValue": "BUY NOW" }, { "id": "2", "operator": { "type": "string", "operation": "equals" }, "leftValue": "={{ $json.recommendations['Category B'].action }}", "rightValue": "BUY NOW" } ] } }, "typeVersion": 2.1 }, { "id": "dd4f819f-2115-41bb-a472-6149662d2e20", "name": "Send Telegram Alert", "type": "n8n-nodes-base.telegram", "position": [ 2224, 368 ], "parameters": { "text": "=\ud83d\udea8 *COE BUY ALERT* \ud83d\udea8\n\nOptimal buying opportunity detected!\n\n{{ Object.entries($json.recommendations)\n .filter(([_, rec]) => rec.action === 'BUY NOW')\n .map(([cat, rec]) => `*${cat}*: $${rec.currentPrice.toLocaleString('en-SG')}\\nScore: ${rec.score}/100\\n${rec.timingAdvice}`)\n .join('\\n\\n') }}\n\nView full report in your email.", "chatId": "{{ $('Schedule Trigger - Bi-Weekly COE Scraping').item.json.telegramChatId }}", "additionalFields": { "parse_mode": "Markdown" } }, "typeVersion": 1.2 }, { "id": "b08a514c-b77d-46d2-a928-70efd0ef643a", "name": "Generate Dashboard Summary", "type": "n8n-nodes-base.set", "position": [ 2000, 576 ], "parameters": { "options": {}, "assignments": { "assignments": [ { "id": "1", "name": "dashboardSummary", "type": "string", "value": "=## Singapore COE Dashboard - {{ new Date().toLocaleDateString('en-SG') }}\n\n### Current Prices\n{{ Object.entries($('Generate Buy Recommendations').first().json.recommendations)\n .map(([cat, rec]) => `**${cat}**: $${rec.currentPrice?.toLocaleString('en-SG') || 'N/A'}`)\n .join('\\n') }}\n\n### Top Recommendation\n**{{ $('Generate Buy Recommendations').first().json.bestCategory }}** (Score: {{ $('Generate Buy Recommendations').first().json.bestCategoryScore }}/100)\n\n### Market Overview\n- Dominant Trend: {{ Object.entries($('Generate Buy Recommendations').first().json.marketOverview.dominantTrend).sort((a,b) => b[1] - a[1])[0][0] }}\n- Average Volatility: {{ $('Generate Buy Recommendations').first().json.marketOverview.averageVolatility > 2.5 ? 'High' : $('Generate Buy Recommendations').first().json.marketOverview.averageVolatility > 1.5 ? 'Medium' : 'Low' }}\n\n### Action Items\n{{ Object.entries($('Generate Buy Recommendations').first().json.recommendations)\n .map(([cat, rec]) => `- **${cat}**: ${rec.action} - ${rec.timingAdvice}`)\n .join('\\n') }}" } ] } }, "typeVersion": 3.4 }, { "id": "2ce78f73-1b51-43b9-94cf-e6b7ce7544df", "name": "Sticky Note", "type": "n8n-nodes-base.stickyNote", "position": [ 0, -64 ], "parameters": { "width": 992, "height": 384, "content": "## Introduction\nAutomates Singapore COE price tracking, predicts trends using AI, and recommends optimal car purchase timing. Scrapes LTA data biweekly, analyzes historical trends, forecasts next 6 bidding rounds, and sends alerts when buying windows appear\u2014saving time and identifying cost-saving opportunities.\n\n## How it Works\nBiweekly trigger scrapes LTA COE data \u2192 processes historical trends \u2192 AI predicts 6-month prices \u2192 compares current vs forecast \u2192 generates buy/wait recommendations \u2192 alerts sent via Gmail or Telegram.\n\n## Setup Steps\n1. Add NVIDIA/OpenAI API credentials in n8n\n2. Connect Google Sheets for data storage\n3. Authenticate Gmail/Telegram for notifications\n4. Schedule trigger for Wednesdays 8PM SGT\n5. Configure alert thresholds in conditional nodes\n\n" }, "typeVersion": 1 }, { "id": "ec982981-33f8-4e23-97bc-8fddeb3db95a", "name": "Sticky Note1", "type": "n8n-nodes-base.stickyNote", "position": [ 1056, -64 ], "parameters": { "color": 4, "width": 512, "height": 224, "content": "## Prerequisites\nNVIDIA/OpenAI API key, Google account (Sheets), Gmail/Telegram for notifications, basic COE category knowledge\n\n## Use Cases\nFirst-time buyers monitoring price dips, fleet managers timing bulk purchases\n" }, "typeVersion": 1 }, { "id": "356985f8-b8b9-4166-9267-06607e03e479", "name": "Sticky Note2", "type": "n8n-nodes-base.stickyNote", "position": [ 1632, -64 ], "parameters": { "color": 5, "width": 544, "height": 224, "content": "## Customization\nAdd economic indicators, integrate car loan calculators, track parallel imported car prices\n\n## Benefits\nSaves hours of manual monitoring, captures 10\u201315% price dips, provides data-driven purchase timing (potential $5K\u2013$15K savings)" }, "typeVersion": 1 }, { "id": "3ef5c1ec-d77f-450b-b446-ba0f20847718", "name": "Sticky Note3", "type": "n8n-nodes-base.stickyNote", "position": [ 0, 560 ], "parameters": { "color": 6, "width": 752, "height": 96, "content": "## Workflow\nSchedule Trigger \u2192 HTTP Request (Scrape LTA) \u2192 Data Processing \u2192 Google Sheets (Store) \u2192 AI Prediction \u2192 Analysis Engine \u2192 Conditional Logic \u2192 Gmail/Telegram Notification\n\n" }, "typeVersion": 1 }, { "id": "59139375-d79a-4bf8-a073-de197b6b5456", "name": "OpenRouter Chat Model", "type": "@n8n/n8n-nodes-langchain.lmChatOpenRouter", "position": [ 1424, 560 ], "parameters": { "model": "z-ai/glm-4.5", "options": {} }, "credentials": { "openRouterApi": { "name": "" } }, "typeVersion": 1 }, { "id": "d67e15bf-2829-4e99-adb3-43f841d34020", "name": "Sticky Note4", "type": "n8n-nodes-base.stickyNote", "position": [ 784, 560 ], "parameters": { "color": 3, "width": 576, "height": 192, "content": "## Workflow Steps\n1. Scraping: Extract COE prices from OneMotoring\n2. Processing: Calculate moving averages, volatility, seasonal trends\n3. Storage: Save to Google Sheets with timestamps\n4. Prediction: AI forecasts next 6 bidding rounds\n5. Analysis: Compare current vs predicted prices, generate recommendation\n6. Notification: Alerts via email/Telegram" }, "typeVersion": 1 } ], "active": false, "settings": { "executionOrder": "v1" }, "versionId": "793fae3d-cde8-4016-ad16-e27224d55ff7", "connections": { "Format HTML Report": { "main": [ [ { "node": "Send Email Report", "type": "main", "index": 0 } ] ] }, "OpenRouter Chat Model": { "ai_languageModel": [ [ { "node": "AI Agent - COE Analysis", "type": "ai_languageModel", "index": 0 } ] ] }, "Extract COE Price Data": { "main": [ [ { "node": "Store in Google Sheets", "type": "main", "index": 0 } ] ] }, "Store in Google Sheets": { "main": [ [ { "node": "Retrieve Historical COE Data", "type": "main", "index": 0 } ] ] }, "AI Agent - COE Analysis": { "main": [ [ { "node": "Generate Buy Recommendations", "type": "main", "index": 0 } ] ] }, "Check for Buy Opportunities": { "main": [ [ { "node": "Send Telegram Alert", "type": "main", "index": 0 } ] ] }, "Generate Buy Recommendations": { "main": [ [ { "node": "Format HTML Report", "type": "main", "index": 0 }, { "node": "Check for Buy Opportunities", "type": "main", "index": 0 }, { "node": "Generate Dashboard Summary", "type": "main", "index": 0 } ] ] }, "Prepare AI Prediction Prompt": { "main": [ [ { "node": "AI Agent - COE Analysis", "type": "main", "index": 0 } ] ] }, "Retrieve Historical COE Data": { "main": [ [ { "node": "Calculate Technical Indicators", "type": "main", "index": 0 } ] ] }, "Calculate Technical Indicators": { "main": [ [ { "node": "Prepare AI Prediction Prompt", "type": "main", "index": 0 } ] ] }, "Scrape COE Data from OneMotoring": { "main": [ [ { "node": "Extract COE Price Data", "type": "main", "index": 0 } ] ] }, "Schedule Trigger - Bi-Weekly COE Scraping": { "main": [ [ { "node": "Scrape COE Data from OneMotoring", "type": "main", "index": 0 } ] ] } } }