I want to enable auto take down after some time, is there such a feature in the MoonBot terminal?

: Strategy settings

Yes, in the strategy settings there are a number of parameters that are responsible for Sell order auto-down after some time. Specifically, the timer for enabling auto down is set in the PriceDownTimer parameter (the value is set in seconds), if you set it to zero, the timer will not be enabled and the Sell order will not go down.