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28 lines
1.3 KiB
Markdown
28 lines
1.3 KiB
Markdown
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# Example (JKQTPlotter): Financial Chart (Candlestick/OHLC) Example {#JKQTPlotterFinancialChartExample}
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This project (see [`financialgraphs`](https://github.com/jkriege2/JKQtPlotter/tree/master/examples/financialgraphs) demonstrates the use of JKQTPFinancialGraph to visualize financial data (i.e. market price development of stocks, derivatives, ...).
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The source code of the main application is (see [`financialgraphs.cpp`](https://github.com/jkriege2/JKQtPlotter/tree/master/examples/financialgraphs/financialgraphs.cpp).
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Here is a short summary of the important parts of the code:
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```.cpp
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```
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The result looks like this:
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By default, the length of the drawn vector is determined from the actual length in the data via an autoscaling algorithm that is supposed to prevent the vectors from overlapping.
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But you can modify this behaviour by adding a line
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```.cpp
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graph1->setVectorLengthMode(JKQTPVectorFieldGraph::LengthFromData);
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```
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which will use the given lengths directly (only scaled by an optional factor defined by JKQTPVectorFieldGraph::setLengthScaleFactor() ). The result then looks like this:
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