Trading During Holidays (US, Thanks Giving Holidays)

1st of all, like Many experts in FX always said,
don't trade during Holidays time , because it is dangerous .

now , i knew why , i have personnally experienced it,

In one day alone , i got Margin Call,
and that took 90% off my account causing me to lose USD1200.
All my hard-earned 2 months profit + capital flush down back to the market .

Conclusion,
Avoid trading during those times