Pine Script Dynamic Alert Messages
Builds alert text at runtime with str.tostring — symbol, price, size — so the payload always reflects the live bar instead of a static template.
Pine Script
//@version=6
strategy("Target Filled - Dynamic Alert Example", overlay=true, calc_on_every_tick=false)
// --- Inputs ---------------------------------------------------
contracts = input.int(1, "Order Size", minval=1)
// --- Runtime message builder --------------------------------------
// {{ticker}} / {{close}} style placeholders only work in the alert
// DIALOG's message box. Strings passed to alert() must be built in code.
buildMsg(side) =>
side + " " + syminfo.ticker + " x" + str.tostring(contracts) +
" @ " + str.tostring(close, format.mintick) + " on " + timeframe.period
// --- Sample signal — replace with your own entry logic ---------
fastMA = ta.ema(close, 9)
slowMA = ta.ema(close, 21)
if ta.crossover(fastMA, slowMA)
strategy.entry("Long", strategy.long, qty=contracts)
alert(buildMsg("BUY"), alert.freq_once_per_bar_close)
if ta.crossunder(fastMA, slowMA)
strategy.entry("Short", strategy.short, qty=contracts)
alert(buildMsg("SELL"), alert.freq_once_per_bar_close)Settings
| Input | Default | Purpose |
|---|---|---|
| contracts | 1 | Contract quantity used for the entry and echoed into the alert text. |
How to use
- Paste into the Pine Editor and swap the EMA-crossover placeholder for your own entry conditions.
- Extend
buildMsgwith anything else worth tracking — stop price, target, session P&L — via morestr.tostringcalls. - Use
format.mintickwhenever a price gets embedded, so the string always lands on the symbol's tick grid. - For a JSON-shaped payload aimed at a specific automation bridge, see the TradersPost and PickMyTrade webhook snippets — same idea, different output format.
Frequently Asked Questions
How do I include the current price in a Pine Script alert?
Concatenate str.tostring(close, format.mintick) into whatever string gets passed to alert(). format.mintick rounds to the symbol's own tick size, so the alert never sends a price the exchange would reject. The same pattern works for anything else worth tracking — a stop, a target, a position size.
What placeholders work in TradingView alerts?
Dialog placeholders like {{ticker}}, {{close}}, {{strategy.order.action}}, and {{strategy.order.contracts}} get substituted by TradingView, but only inside the alert dialog's message box and inside alertcondition() text. A string handed to the alert() function isn't placeholder-processed at all — build it with str.tostring and plain concatenation instead, as this snippet does.