Hello Jacpin,
It is indeed hard to set the range for the cryptocurrencies. This is because the recent months the Bitcoin and the others were staying in a range without huge volatility. During this time when I was generating EAs, I was looking for smaller TP because if I place a huge range, the generator will look at the whole Historical Data. This will include the data from 2017 and 2018 when the bigger TP worked better and Take Profit of 200$ was taken a few times during the day. This was the time when I recorded the two courses for the Bitcoin Never Losing Forumala.
Anyway, now there is some volatility again, so I have increased again the ranges. Also, I am testing now the cryptocurrencies with the update with the Walk Forward Optimization. I have described it in the recent update called EA Studio updates: Walk Forward optimization.
This way we take the last parameters which are best for the recent period of data. And this is very suitable for the cryptocurrencies which have different volatility all the time.
Hope that helps.