The following example is based on trading one standard lot on the Dow Jones 30 Index:
Product: DJ30.fs
Position Size: 1 standard lot
Price: 17,498
Contract Value: $5 per point
Margin Requirement: 1%
Total Exposure: 17498 * 5 = $87,490 USD
Margin: 1% * $87490 = $874.90 USD^
^You will need to convert the margin amount into your base currency if it is different to the currency of the index your position is opened