JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
We do not have a chart field type, but if you chart is just an image file, you can include it with an Image field type from Basic Fields.
Another example is a chart from Google Spreadsheet embedded to the form. It is possible to publish the chart from Google Spreadsheet to add its embed code to your form. The embed code should be added with a Text HTML field type.
If you need any further assistance, please let us know.