So you're suggesting a trade at $200/tick on the dax? That's around 8 standard lots. Each standard lot at 10000 index price is worth notional $0.25 million. Your exposure on the dax is $2 million. The average daily volatility on the dax in December was easily around 150 a day and more than 300 per week, which equates to a $30000-$60000 swing.
I trade with guys on $1 million CFD account. Even they hesitate to bet 8 lots at once on CFD account. Paper trading is very different from real trading