To reiterate what @LKYBOB and @Superbit123 have mentioned.
- you need to self-delegate 100FX for your validator
more information on the states of validators and the conditions can be found here.
- The active validator set is determined solely by the ranking of the total amount staked. The 50 validators with the most total staked are the ones who are designated as active validators . If a validator’s total stake falls below the top 50 then that validator loses their validator privileges: they don’t participate in consensus and generate rewards any more. Over time, the maximum number of validators may increase via on-chain governance proposal. More info on that can be found here.
so essentially as long as you have more total staked compared to this last guy on the list here you will be in the active validator set. (you will need just 10FX more on top of what is needed for self-delegated stake).
im also assuming this question is for mainnet. you can direct future questions for general enquiries, updates, tech support.