After reading the appropriate article if you still have problems just post.
Regarding securities, a security is a stock/share, fund etc quoted on one of the worlds stock markets and by the inclusion of ticker symbols when you set up the security its share price can be downloaded using an extension.
There are two methods within Moneydance for obtaining security prices automatically.
The extension “Quote and Exchange Rate Updater found under EXTENSIONS – MANAGE EXTENSIONS. Check you are running the latest build v1024. For exchange rates use the source European Central Bank. Alpha Vantage covers the US as well as some securities outside the US, but is very, very slow. It’s my understanding that the source IEX Trading no longer works.
If the Quote and exchange rate updater does not work well for you try the free third-party Quote Loader. Both of the sources in the Quote Loader have good coverage of worldwide securities.