The two charts have different data sets and this is why you have to different plots for RSI. Try right clicking on the chart and selecting Clear Local Data on both systems and see if that resolves the issue.
when I compared my chart with his I could see differences on the chart. I was not paying attention to the chart. I only watched the RSI. I cleared local data but same. So I wonder if there is more than one BTC chart on bitstamp or what can I do? We got same timeframe but charts is not looking exactly the same. I deleted my workspace and tested with new API keys etc but still the same.
My next suggestion was going to be to have your friend provide you with a backup of his workspace so that you can restore it in your workspace. This will carry over all his settings. In this case, it seems you found the setting causing the difference.
Thanks for the update.