In addition to selecting symbols using the "Symbols Selection" control, the screener allows you enter criteria using the vector-based language. You can also select which bars/dates to analyze. To open this tool, click on Analysis then "Screener". To create a new screen, click on "Create a new screen" button. In the "Edit Screen" tab, click on Symbols to select which symbols to use in this screener. You can also select the date or bar number as well as the time-frame. For the bar option, a value of 0 means that the screener will analyze the last bar and use that last bar to calculate whether the security meets your criteria. Note that with this option, the date used for screening could be different from one security to another. In the Formula Filter group-box, you can type your trading rules. Click on "Switch to editor" to use an advanced rules editor and on "Switch to wizard" to use an simple rules editor. Let us use the Wizard editor. The rules control is very simple to use. The format is as follows: Indicator - Operator - Indicator In the first input box, type for example: close Click on the operator control (>) and select "Less Than". In the second textbox, type: open If you want to add a new rule then click on Add Rule. Click on Add Column to add a new column to the screener result. To test our single-rule screen, click on Start. Once the processing is done, the symbols and the corresponding columns are displaying on the grid located at the bottom. Click now on "Switch to editor" to see how these rule(s) are translated into a QuantShare formula.
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