title: Pine script: Adding two stocks volume values
body: <p>I am trying to take the total volume of two stocks and plot it. One of them started trading in 2022 and the other in 2021. I noticed the plot starts from 2022 skipping the volume for first stock in 2021.</p>
  <pre><code>indicator(&quot;tasi_p1&quot;, overlay=false,format=format.volume)
  
  src  = request.security(&quot;TADAWUL:4164&quot;,timeframe.period,volume, barmerge.gaps_off)
  
  src := src + 
   request.security(&quot;TADAWUL:2082&quot;,timeframe.period,volume, barmerge.gaps_off)
  
  palette = close[1] &gt; close ? color.red : color.green
  
  plot(src,style=plot.style_histogram,color = palette)
  </code></pre>
  <p>My main goal is to plot the volume of group/sector of related stocks and use it in my strategy.</p>
  <p>Also, I noticed same behavior in TradingView when adding the stock symbols in Symbol Search text field like &quot;4164 + 2082&quot; it skips 2021 part even the in candle chart.</p>
  <p>Is there a bug or am I missing something?</p>