>>13186920BBB, since you've gotten around to fixing it, it's not quite as simple. It seems there is an error in your calculator, twofold, in fact:
First of all, selling 1x-5x is taxed as such: 0%, 20%, 30%, 40%, 50%. Only buying has that 5% slapped on top.
Secondly, the way you should calculate it is [multiplier on buying]/[multiplier on selling] - 1. So, for example, for 2x buy/2x sell it's 1.25/0.8 - 1 = 56.3%. The reason why is because those taxes are applied separately. Buying a coin worth $1000 at 2x costs you $1250, so this is the price you have to match; If the coin rises by 56.25% to $1562.5 and you do a 2x sell, you will get $1562.5 in liquid and pay $312.5 (20% of the sum) in taxes, which leaves you at $1250 again, the price you paid. Thus, you break even.
Here's how it should look like, just to break even:
5.0% 31.3% 50.0% 75.0% 110.0%
25.0% 56.3% 78.6% 108.3% 150.0%
35.0% 68.8% 92.9% 125.0% 170.0%
45.0% 81.3% 107.1% 141.7% 190.0%
55.0% 93.8% 121.4% 158.3% 210.0%
This table is inefficient when trying to establish when it would have been actually profitable to multicoin, but it's a good cautionary tale against multiselling.
