tutorials/Charts.html at master · Maniwar/tutorials · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Weekly Resistance App</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <script src="https://unpkg.com/lightweight-charts/dist/lightweight-charts.standalone.production.js"></script>
    <style>
        body { background-color: #0f172a; color: #f8fafc; font-family: 'Segoe UI', system-ui, sans-serif; }
        .card { background-color: #1e293b; border-radius: 0.75rem; padding: 1.5rem; border: 1px solid #334155; }
        #chart-container { height: 500px; width: 100%; border-radius: 0.5rem; overflow: hidden; background-color: #0f172a; }
        .loader { border: 3px solid #334155; border-top: 3px solid #38bdf8; border-radius: 50%; width: 20px; height: 20px; animation: spin 1s linear infinite; display: none; margin-left: 10px; }
        @keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
    </style>
</head>
<body class="p-4 md:p-8 max-w-7xl mx-auto">

    <div class="mb-8 border-b border-slate-700 pb-6">
        <h1 class="text-3xl md:text-4xl font-bold mb-2 text-sky-400">📈 Weekly Pivot & Resistance App</h1>
        <p class="text-slate-400 mb-6">Powered by Twelve Data (Supports ALL Stocks, ETFs, and Crypto natively without proxies).</p>

        <div class="bg-slate-800 p-5 rounded-lg border border-slate-600 mb-6 inline-block w-full max-w-2xl shadow-lg">
            <label class="block text-sm font-semibold text-slate-300 mb-2">🔑 Connect Twelve Data API (Required)</label>
            <div class="flex flex-col sm:flex-row gap-3 items-center">
                <input type="password" id="apiKeyInput" placeholder="Paste your Twelve Data API Key here..."
                       class="bg-slate-900 border border-slate-600 text-white rounded px-3 py-2 w-full sm:w-80 focus:border-sky-500 outline-none font-mono">
                <p class="text-xs text-slate-400 w-full sm:w-auto">
                    Get your free key from <br>
                    <a href="https://twelvedata.com/pricing" target="_blank" class="text-sky-400 underline hover:text-sky-300">TwelveData.com</a> (800 requests/day)
                </p>
            </div>
            <p class="text-xs text-slate-500 mt-2 italic">*Your key is saved securely in your browser memory so you only have to paste it once.</p>
        </div>

        <div class="flex flex-col sm:flex-row items-start sm:items-center gap-4">
            <input type="text" id="tickerInput" value="SOFI" placeholder="Enter ticker..."
                   class="bg-slate-800 border border-slate-600 text-white rounded-lg px-4 py-3 w-64 focus:outline-none focus:border-sky-500 text-lg uppercase shadow-sm">
            <button onclick="calculateLevels()" id="calcBtn"
                    class="bg-sky-600 hover:bg-sky-500 text-white font-semibold py-3 px-6 rounded-lg transition flex items-center shadow-md">
                Calculate Levels
                <div id="loading" class="loader"></div>
            </button>
        </div>
        <div id="errorMsg" class="text-red-400 mt-4 hidden text-sm font-semibold bg-red-900/20 py-2 px-4 rounded border border-red-900/50 inline-block"></div>
    </div>

    <div id="results" class="grid grid-cols-2 md:grid-cols-5 gap-4 mb-8 hidden">
        <div class="card border-t-4 border-t-red-500 shadow-lg text-center">
            <div class="text-xs font-semibold text-slate-400 uppercase tracking-wider mb-1">R3 (Extreme)</div>
            <div class="text-2xl font-bold text-red-400" id="valR3">--</div>
        </div>
        <div class="card border-t-4 border-t-orange-400 shadow-lg text-center">
            <div class="text-xs font-semibold text-slate-400 uppercase tracking-wider mb-1">R2 (Breakout)</div>
            <div class="text-2xl font-bold text-orange-400" id="valR2">--</div>
        </div>
        <div class="card border-t-4 border-t-yellow-400 shadow-lg text-center">
            <div class="text-xs font-semibold text-slate-400 uppercase tracking-wider mb-1">R1 (First Hurdle)</div>
            <div class="text-2xl font-bold text-yellow-400" id="valR1">--</div>
        </div>
        <div class="card border-t-4 border-t-sky-500 shadow-lg text-center">
            <div class="text-xs font-semibold text-slate-400 uppercase tracking-wider mb-1">Pivot Point</div>
            <div class="text-2xl font-bold text-sky-400" id="valPP">--</div>
        </div>
        <div class="card border-t-4 border-t-slate-500 shadow-lg text-center">
            <div class="text-xs font-semibold text-slate-400 uppercase tracking-wider mb-1">Current Price</div>
            <div class="text-2xl font-bold text-white" id="valCP">--</div>
        </div>
    </div>

    <div id="chartWrapper" class="hidden">
        <h2 class="text-xl font-semibold mb-4 text-slate-300">📊 Daily Price Action vs. Weekly Mathematical Ceilings</h2>
        <div class="card shadow-lg p-2">
            <div id="chart-container"></div>
        </div>
    </div>

    <script>
        let chart;
        const formatCurrency = (num) => new Intl.NumberFormat('en-US', { style: 'currency', currency: 'USD' }).format(num);

        // Save API Key to browser memory as the user types
        document.getElementById("apiKeyInput").addEventListener("input", function(e) {
            localStorage.setItem("tdApiKey", e.target.value.trim());
        });

        // Load saved API Key automatically when the page opens
        window.addEventListener('DOMContentLoaded', () => {
            const savedKey = localStorage.getItem('tdApiKey');
            if(savedKey) {
                document.getElementById('apiKeyInput').value = savedKey;
            }
        });

        function getISOWeekString(dateStr) {
            const parts = dateStr.split('-');
            const d = new Date(parts[0], parts[1] - 1, parts[2]);
            d.setHours(0, 0, 0, 0);
            d.setDate(d.getDate() + 4 - (d.getDay() || 7));
            const yearStart = new Date(d.getFullYear(), 0, 1);
            const weekNo = Math.ceil((((d - yearStart) / 86400000) + 1) / 7);
            return `${d.getFullYear()}-W${weekNo.toString().padStart(2, '0')}`;
        }

        // --- TWELVE DATA API ENGINE ---
        async function fetchMarketData(ticker, apiKey) {
            let formattedTicker = ticker.toUpperCase();

            // Twelve Data format handlers for Crypto (e.g. BTC/USD instead of BTC-USD)
            if (formattedTicker.includes("-USD")) {
                formattedTicker = formattedTicker.replace("-USD", "/USD");
            } else if (formattedTicker === "BTC" || formattedTicker === "ETH") {
                formattedTicker += "/USD";
            }

            // Native, direct connection - No proxy required!
            const url = `https://api.twelvedata.com/time_series?symbol=${formattedTicker}&interval=1day&outputsize=90&apikey=${apiKey}`;

            const response = await fetch(url);
            if (!response.ok) throw new Error("Network request failed. Check your internet connection.");

            const data = await response.json();

            if (data.code === 429) {
                throw new Error("Twelve Data free tier limit reached (8 requests per minute). Wait 60 seconds and try again.");
            }
            if (data.status === "error") {
                throw new Error(data.message || "Invalid API key or Ticker symbol not found.");
            }
            if (!data.values || data.values.length === 0) {
                throw new Error("No data returned. Make sure the ticker symbol is valid.");
            }

            // TwelveData returns data newest->oldest. We reverse it so it renders perfectly chronologically on the chart.
            const historical = data.values.reverse();

            return historical.map(day => ({
                dateStr: day.datetime,
                open: parseFloat(day.open),
                high: parseFloat(day.high),
                low: parseFloat(day.low),
                close: parseFloat(day.close)
            }));
        }

        async function calculateLevels() {
            const ticker = document.getElementById("tickerInput").value.trim().toUpperCase();
            const apiKey = document.getElementById("apiKeyInput").value.trim();
            const errorMsg = document.getElementById("errorMsg");

            if (!apiKey) {
                errorMsg.innerText = "Error: Please paste your free Twelve Data API key into the box above.";
                errorMsg.classList.remove("hidden");
                return;
            }
            if (!ticker) return;

            const loader = document.getElementById("loading");
            const btn = document.getElementById("calcBtn");
            const results = document.getElementById("results");
            const chartWrapper = document.getElementById("chartWrapper");

            loader.style.display = "inline-block";
            btn.disabled = true;
            btn.classList.add("opacity-75");
            errorMsg.classList.add("hidden");

            try {
                const dailyData = await fetchMarketData(ticker, apiKey);

                const weeks = {};
                const chartData = [];
                const seenDates = new Set();

                for (let i = 0; i < dailyData.length; i++) {
                    const day = dailyData[i];
                    if (seenDates.has(day.dateStr)) continue;
                    seenDates.add(day.dateStr);

                    const weekStr = getISOWeekString(day.dateStr);

                    if (!weeks[weekStr]) {
                        weeks[weekStr] = { high: day.high, low: day.low, close: day.close };
                    } else {
                        weeks[weekStr].high = Math.max(weeks[weekStr].high, day.high);
                        weeks[weekStr].low = Math.min(weeks[weekStr].low, day.low);
                        weeks[weekStr].close = day.close;
                    }

                    chartData.push({
                        time: day.dateStr, open: day.open, high: day.high, low: day.low, close: day.close
                    });
                }

                const sortedWeekStrs = Object.keys(weeks).sort();
                const latestDataWeek = sortedWeekStrs[sortedWeekStrs.length - 1];

                const nyTimeStr = new Date().toLocaleString("en-US", {timeZone: "America/New_York"});
                const nyTime = new Date(nyTimeStr);
                const nyDateStr = `${nyTime.getFullYear()}-${String(nyTime.getMonth()+1).padStart(2,'0')}-${String(nyTime.getDate()).padStart(2,'0')}`;

                const currentRealWorldWeek = getISOWeekString(nyDateStr);
                const nyDay = nyTime.getDay();
                const nyHour = nyTime.getHours();
                const isWeekendEnd = (nyDay === 6 || nyDay === 0) || (nyDay === 5 && nyHour >= 16);

                let targetWeekStr;
                if (latestDataWeek === currentRealWorldWeek) {
                    if (isWeekendEnd) {
                        targetWeekStr = latestDataWeek;
                    } else {
                        if(sortedWeekStrs.length < 2) throw new Error("Not enough historical data.");
                        targetWeekStr = sortedWeekStrs[sortedWeekStrs.length - 2];
                    }
                } else {
                    targetWeekStr = latestDataWeek;
                }

                const targetWeek = weeks[targetWeekStr];

                const high = targetWeek.high;
                const low = targetWeek.low;
                const close = targetWeek.close;
                const currentPrice = dailyData[dailyData.length - 1].close;

                const pp = (high + low + close) / 3;
                const r1 = (2 * pp) - low;
                const r2 = pp + (high - low);
                const r3 = high + 2 * (pp - low);

                document.getElementById("valR3").innerText = formatCurrency(r3);
                document.getElementById("valR2").innerText = formatCurrency(r2);
                document.getElementById("valR1").innerText = formatCurrency(r1);
                document.getElementById("valPP").innerText = formatCurrency(pp);
                document.getElementById("valCP").innerText = formatCurrency(currentPrice);

                results.classList.remove("hidden");
                chartWrapper.classList.remove("hidden");

                const chartContainer = document.getElementById("chart-container");
                chartContainer.innerHTML = "";

                chart = LightweightCharts.createChart(chartContainer, {
                    layout: { background: { type: 'solid', color: '#0f172a' }, textColor: '#94a3b8' },
                    grid: { vertLines: { color: '#1e293b' }, horzLines: { color: '#1e293b' } },
                    timeScale: { timeVisible: true, borderColor: '#334155' },
                    rightPriceScale: { borderColor: '#334155' },
                    crosshair: { mode: 0 }
                });

                const candlestickSeries = chart.addCandlestickSeries({
                    upColor: '#22c55e', downColor: '#ef4444',
                    borderVisible: false, wickUpColor: '#22c55e', wickDownColor: '#ef4444'
                });

                candlestickSeries.setData(chartData);

                const createLine = (price, color, title) => {
                    candlestickSeries.createPriceLine({
                        price: price, color: color, lineWidth: 2, lineStyle: 2, axisLabelVisible: true, title: title
                    });
                };

                createLine(r3, '#ef4444', 'R3');
                createLine(r2, '#fb923c', 'R2');
                createLine(r1, '#facc15', 'R1');
                createLine(pp, '#38bdf8', 'Pivot');

                chart.timeScale().fitContent();

            } catch (error) {
                errorMsg.innerText = "Error: " + error.message;
                errorMsg.classList.remove("hidden");
            } finally {
                loader.style.display = "none";
                btn.disabled = false;
                btn.classList.remove("opacity-75");
            }
        }

        document.getElementById("tickerInput").addEventListener("keypress", function(event) {
            if (event.key === "Enter") calculateLevels();
        });

        window.addEventListener('resize', () => {
            if(chart) chart.applyOptions({ width: document.getElementById('chart-container').clientWidth });
        });
    </script>
</body>
</html>