Snapshots
How it works
- alertcondition() adds an entry to the alert menu. alert() fires from inside the code and can build the message while the script runs.
- barstate.isconfirmed means the alert only fires on a finished candle, so a signal cannot vanish after it fires.
- The JSON message is plain text in a shape a program can read: send it to a webhook and your own program places the order.
Settings
| Setting | Default | What it does |
|---|---|---|
| Fast average | 9 | Fast EMA length |
| Slow average | 21 | Slow EMA length |
| Order size to send | 0.01 | The quantity written into the JSON message |
Source code
In TradingView: open the Pine Editor, create a new indicator, paste the code, then click "Add to chart".
//@version=6 indicator("Alerts & Automation", overlay = true) // 1. Settings fastLen = input.int(9, "Fast average") slowLen = input.int(21, "Slow average") qty = input.float(0.01, "Order size to send", step = 0.01) // 2. The signals we want to be told about fast = ta.ema(close, fastLen) slow = ta.ema(close, slowLen) plot(fast, "Fast", color.aqua) plot(slow, "Slow", color.orange) buySignal = ta.crossover(fast, slow) sellSignal = ta.crossunder(fast, slow) // 3. A readable message for your phone priceText = str.tostring(close, format.mintick) buyText = "BUY " + syminfo.ticker + " at " + priceText sellText = "SELL " + syminfo.ticker + " at " + priceText // 4. A machine-readable message for a broker webhook buyJson = '{"action":"buy","symbol":"' + syminfo.ticker + '","qty":' + str.tostring(qty) + '}' sellJson = '{"action":"sell","symbol":"' + syminfo.ticker + '","qty":' + str.tostring(qty) + '}' // 5. alert() fires by itself, once the candle closes if buySignal and barstate.isconfirmed alert(buyJson, alert.freq_once_per_bar_close) if sellSignal and barstate.isconfirmed alert(sellJson, alert.freq_once_per_bar_close) // 6. alertcondition() appears in the alert menu instead alertcondition(buySignal, "Buy signal", "{{ticker}} buy") alertcondition(sellSignal, "Sell signal", "{{ticker}} sell") // 7. Show the signals on the chart plotshape(buySignal, "Buy", shape.triangleup, location.belowbar, color.green, text = "BUY", textcolor = color.white, size = size.small) plotshape(sellSignal, "Sell", shape.triangledown, location.abovebar, color.red, text = "SELL", textcolor = color.white, size = size.small)
Watch it built
This script is written and explained step by step in the video lesson.
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Non-repainting Pine Script v6, backtested with real costs, alert and webhook ready. Fixed quote within 24 hours.