# TradingView → Telegram setup service

Accepts TradingView webhook alerts, renders a Binance Futures candlestick setup chart, and posts photo + caption into a Telegram forum topic.

## Quick start (Docker / VPS)

1. Copy env and fill Telegram values:

```bash
cp .env.example .env
```

```env
TELEGRAM_BOT_TOKEN=...
TELEGRAM_CHAT_ID=-100...
TELEGRAM_MESSAGE_THREAD_ID=...
HOST=0.0.0.0
PORT=8000
```

2. Build and run:

```bash
docker compose up -d --build
```

3. Health check:

```bash
curl http://127.0.0.1:8000/health
```

4. Put HTTPS in front (nginx/Caddy) and point TradingView webhook to:

`https://your-domain/webhook`

Bot must be added to the group/forum and allowed to post in the target topic.

## Local run (without Docker)

```bash
python -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt
cp .env.example .env   # fill values
uvicorn app.main:app --host 0.0.0.0 --port 8000 --reload
```

## TradingView alert JSON

The webhook accepts a **single-line or pretty-printed JSON** body, including TradingView’s common `Content-Type: text/plain`.

Static example (alert **Webhook message** body) — primary setup (`signal_sequence: 1`):

```json
{
  "ticker": "{{ticker}}",
  "action": "long",
  "entry_price": "65034.7",
  "current_price": "65034.7",
  "stop_loss_price": "63904.9",
  "take_profit_1_price": "66085.9",
  "take_profit_2_price": "67209.2",
  "take_profit_3_price": "68355.5",
  "visual_timeframe": "15",
  "signal_sequence": 1,
  "signal_time": 1721736000
}
```

Control update (`signal_sequence` > 1) — Pine freezes `entry_price` / SL / TPs / `signal_time` from seq 1 and sends live `current_price`:

```json
{
  "ticker": "{{ticker}}",
  "action": "short",
  "entry_price": "65034.7",
  "current_price": "64000.1",
  "stop_loss_price": "65896.8",
  "take_profit_1_price": "63904.9",
  "take_profit_2_price": "62781.6",
  "take_profit_3_price": "61635.3",
  "visual_timeframe": "15",
  "signal_sequence": 2,
  "signal_time": 1721736000
}
```

### PineScript `alert()` (recommended)

Build the JSON inside `alert()`. A continuous one-line string is fine.

In the TradingView alert dialog:

- Webhook URL: `https://your-domain/webhook`
- Message: only `{{alert_message}}` (do not paste a second JSON next to it)

On **seq == 1**: store `entry_price = close`, freeze SL/TPs, and `signal_time = time / 1000` (bar open, unix seconds). On **seq > 1**: keep those frozen fields; only refresh `current_price` (= live `close`). Example shape:

```pinescript
alert('{"ticker":"' + syminfo.ticker + '","action":"long","entry_price":"' + str.tostring(long_entry_price, format.mintick) + '","current_price":"' + str.tostring(close, format.mintick) + '","stop_loss_price":"' + str.tostring(long_sl_price, format.mintick) + '","take_profit_1_price":"' + str.tostring(long_tp1_price, format.mintick) + '","take_profit_2_price":"' + str.tostring(long_tp2_price, format.mintick) + '","take_profit_3_price":"' + str.tostring(long_tp3_price, format.mintick) + '","visual_timeframe":"' + timeframe.period + '","signal_sequence":' + str.tostring(buyCount) + ',"signal_time":' + str.tostring(signal_buy_time) + '}', alert.freq_once_per_bar_close)
```

(Same idea for shorts with `short_entry_price` / `sellCount` / `signal_sell_time`.) Caption emoji/labels are built by the service from `action` + `signal_sequence` — do not put them in the webhook JSON.

Field notes:

| Field | Description |
|---|---|
| `ticker` | any common TV form (`BTCUSDT.P`, `BTCUSDT`, `BINANCE:ETHUSDT`, `BTC/USDT`, …) → normalized to Binance Futures symbol for the chart; caption keeps the original |
| `action` | `long` or `short` |
| `entry_price` | trade entry from seq 1 (equals `current_price` on primary signal) |
| `current_price` | live price (`close` at alert time) |
| `*_price` | strings with your display precision |
| `visual_timeframe` | `1`, `3`, `5`, `15`, `30`, `60`, `120`, `240`, `D`, `W` (also `15m`, `1h`, …) |
| `signal_sequence` | `1` = primary setup; `>1` = control update of that trade |
| `signal_time` | unix seconds of the seq-1 bar open (UTC); chart draws Entry/SL/TP zones from that candle |

## Caption format

**seq `1` (setup):**

- long: `BTCUSDT.P 💚 Buy`
- short: `BTCUSDT.P 💔 Sell`
- body: `Price` / `SL (risk %)` / `TP1–3`

**seq `>1` (control):**

- long: `BTCUSDT.P 🌱 Buy Seq: N`
- short: `BTCUSDT.P 🥀 Sell Seq: N`
- body: `Entry price` (from seq 1) / live `Price` / `Current profit: +1.6% (RR 1:1.2)`
- no new SL/TP lines in the caption

Prices are shown with `$` and thousand spaces (`65034.7` → `$65 034.7`).
For seq 1, SL includes distance from entry: `SL: $63 904.9 (-2.37%)` (risk %, negative for both long and short).
For seq >1, profit % is signed vs entry; RR is `|price−entry| / |entry−SL|` with the same sign as profit.

## Behavior

1. Validate payload
2. Fetch ~90 klines from Binance USDT-M Futures (public, no API key)
3. Render PNG: candles + Entry / SL / TP1–3 from the payload, starting at the `signal_time` candle (seq `>1` reuses frozen seq-1 levels/time and also marks live `Price`)
4. `sendPhoto` to `TELEGRAM_CHAT_ID` topic `TELEGRAM_MESSAGE_THREAD_ID`
5. If chart/klines fail → text-only `sendMessage` fallback (still `200`)
6. If Telegram fails → `502`

## Endpoints

- `GET /health` → `{"status":"ok"}`
- `POST /webhook` → signal payload above