Margin Percentage Requirement and Health Factor for Aave Liquidations in Trading

I'm a developer who is interested in the margin percentage requirement and health factor needed for liquidation in trading. I would like to know what the margin percentage requirement is before a liquidation can take place? Also, what is the recommended health factor to max out at?

I believe understanding these requirements and factors would help me develop better trading strategies and assess the risks when building financial applications. Any suggestions or recommendations on these topics would be greatly appreciated.