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> I want to create a setup: SlowK crosses below 90 and then sell
> when a low takes out the previous low.
>
> "If L < L[1]" doesn't work because if the market first rallies, I
> want to sell a low that takes out the previous low, even though it
> may be higher than when the SlowK crossed below 10.
Right. "L<L[1]" just says "if this bar's low is lower than the
previous bar's low." That's not what you want -- you want the
"previous low."
First you have to define what you mean by "previous low." The low at
the time SlowK crosses below 90? The previous swing low before the
SlowK crossing?
For purposes of illustration I'll be lazy and assume you mean the low
at the time SlowK crossed below 90.
Having defined that, you then have to REMEMBER that "previous low"
value and compare the current low to THAT value.
For example:
Vars: Slo(0), RecentLow(999999);
Slo = SlowK(whatever);
if (Slo crosses under 90) then RecentLow = Low;
if Low < RecentLow then sell;
You also have to decide when to CLEAR the value of RecentLow. Does
it stay in force until you sell, or until the next time SlowK crosses
under 90, or does it "expire" after N bars, or...? Whenever you
decide the old value of RecentLow has expired, reset it to 999999 so
the "if Low < RecentLow" test will fail until you set it to a new
valid value.
Gary
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