The problem 1x.ag - Leverage Aggregator solves

Easy leverage ERC20 tokens with stop-losses an take-profits on top of Compound, Fulcrum, Aave and MakerDAO CDP with usage of Aave flash loans, ChainLink oracles for on-chain price verification and 1split.eth swaps (spliited swaps among Kyber, Bancor, MakerDAO and Uniswap).

Reduced risks to get a high price slippage at big trading amounts by splitting token swaps among Kyber, Bancor, MakerDAO / Oasis and Uniswap.

Challenges I ran into

Taking flash loans from Aave and using them in a callback call. Making CDP for leverage positions.