you can try with this one,
https://www.bitso.me/hi-lo-calc.php
it does 1 million rolls in 0.5 seconds (on i7 8gb ram with chunk size 20000) without locking browser.
You can test also billions.
I suggest you beginning at 10^-8 as base bet, 1 satoshi.
Not graphs yet.. but I'll add more stuff in future.
Use Strategy=0 for classic martingale.
Cheers.
Nice tool.
Does the HIGH/LOW box only take 0 and 1 as inputs? It's not very clear which is which so I suggest making this a checkbox stating whether you want to roll high (and just default to low if it's not checked).
You should also display specifically the settings each strategy uses without having to guess which number it is. I'm not sure how many strategies you implemented so making some kind of summary for each that can be viewed all at once will be useful.