This is a good idea, but it appears there is some color bug (or intention) showing red color instead of green for almost empty blocks.
I know this is only visual and it's not a big deal, but I saw something strange and compared it with main mempool.space website.
You can see this in screenshots posted below:

I saw that FixedFloat has best exchange rates in my case, and also that you offer guarantee against them scamming.
I would not recommend that exchange to anyone, and you should also double check rates on all exchanges shown in OranegFren.
There were some issues in past showing incorrect rates.