The following diagram illustrates the flow of data in the ScanExpert application.
| • | The eSignal Data Layer module (ESD) collects the price/volume data and passes it on to the ScanExpert application. |
| • | ScanExpert updates internal streams that are associated with the incoming data. |
| • | Each stream that is updated, in turn, calls all study formulas that are designated as clients of that stream. |
| • | Each study formula updates its own internal stream, and these streams, in turn, call all designated client study formulas, if any. This will continue for each stream until there are no additional client study formulas in the client chain. |
| • | The last stream (i.e., no additional clients) will call the user script and force a update. |
| • | The user script will perform any calculations internal to the script and will send all data in a block back to the ScanExpert Grid for display. |
| • | A new batch of data is delivered by ESD and the process repeats. |