Is it possible to separately add alert code to any indicator? Does it work?

<p id="isPasted">I think this is what your looking for, remember following an indicator blindly probably wont work look for other factors in your trades.</p><p><br></p><p>indicator(title='Heiken Ashi Pivot Blue Candle over Regular Candles', overlay=true)</p><p>ha_handle = ticker.heikinashi(syminfo.tickerid)</p><p>ha_open = request.security(ha_handle, timeframe.period, open)</p><p>ha_close = request.security(ha_handle, timeframe.period, close)</p><p>o = request.security(syminfo.tickerid, timeframe.period, open)</p><p>c = request.security(syminfo.tickerid, timeframe.period, close)</p><p>col_blue = #32a7ff</p><p>col_green = #669b66</p><p>col_black = #550000</p><p>col_red = #e54444</p><p>ha1 = ha_close &gt; ha_open ? col_blue : col_black</p><p>ha2 = ha_close[1] &gt; ha_open[1] ? col_blue : col_black</p><p>ha3 = ha1 == ha2 ? color.white : ha1</p><p>ha11 = ha_close &gt; ha_open ? true : na</p><p>ha22 = ha_close[1] &gt; ha_open[1] ? true : na</p><p>pl = c &gt; o ? col_green : col_red</p><p>final = ha3 == color.white ? pl : ha3</p><p>barcolor(final)</p><p>alertcondition(ha11, title = 'Close &gt; Open', message = 'Close &gt; Open {{ticker}} {{interval}} {{close}}')</p><p>alertcondition(ha22, title = 'Close &lt; Open', message = 'Close &lt; Open {{ticker}} {{interval}} {{close}}')</p>

<p id="isPasted">Yes, you can absolutely add alert code to almost any indicator, though the process depends on whether the indicator is "open source" (you can see the code) or "closed source" (you only see the plot).</p><p><strong>1. For Open Source Indicators (Pine Script/MQL4)</strong></p><p>If you have access to the source code, you can manually insert an alert trigger.</p><ul><li>TradingView (Pine Script): You use the alertcondition() or alert() functions. You define a logical "true/false" statement (e.g., Crosses Above) and the script triggers a notification whenever that condition is met.</li><li>MetaTrader (MQL4/MQL5): You insert an Alert() or SendNotification() function inside the code’s "OnCalculate" block.</li></ul><p><strong>2. For Closed Source Indicators</strong></p><p>If you cannot see the code, you cannot "add" code to it directly. However, you can use "Wrapper" or "Overlay" scripts:</p><ul><li>External Connectors: You can create a new, simple script that "calls" the values of the closed indicator using the input.source or iCustom function.</li><li>The "Condition" Method: In TradingView, if an indicator plots a line (like a Moving Average) or a shape, you can usually set an alert via the Alert Menu by selecting that indicator as the "Condition" and choosing "Crossing" or "Entering Channel," even if you haven't touched the code.</li></ul><p><strong>3. Does it work?</strong></p><p>Yes, but with two major "gotchas":</p><ul><li>Repainting: If the indicator "repaints" (changes past signals based on future data), your alert might fire for a signal that later disappears from the chart. This is the biggest cause of "false alerts."</li><li>Bar Close vs. Real-Time: You must decide if the alert should trigger the moment the condition is met (Once Per Bar) or only after the candle closes (Once Per Bar Close). Real-time alerts are faster but prone to "fakeouts."</li></ul><p><br></p><p id="isPasted"><strong>Basic Example (TradingView Pine Script)</strong></p><p>To turn a basic RSI into an alert-ready indicator, you would add:</p><p><strong>pinescript</strong></p><p>// Define the condition</p><p>buySignal = ta.crossover(rsiValue, 30)</p><p>// Create the Alert</p><p>alertcondition(buySignal, title="RSI Buy", message="RSI has crossed above 30!")</p>