I don't know anyone who makes money in the market following that rule of "I don't sell lower than what I bought".

$USUAL is at 0.90 and whenever I see this low price I feel like selling but then I remember that I bought it at 1.15 and if I sell it now I won't make any profit, it may take 5 months or 2 years to recover but I won't sell below what I bought it for.
If the price goes up I'll sell half of what I have at 1.50/1.60