What does this ! mean?

AFL Programming
1

Hi everyone

What does the exclamation mean when used in the following way

CondC = BarsSince(!RSI()>70) >4;

What the AFL help files says that != means 'not equal too' does that mean the RSI is not greater than 70?

cheers

2

! (exclamation sign) is equal to NOT and is logical Not operator.

CondC = BarsSince(! (RSI()>70)) >4;

Or

CondC = BarsSince(NOT (RSI()>70)) >4;

Or

CondC = BarsSince(RSI()<=70) >4;
1 Like
3

@Tomasz, I see that this "C" way to write the logical NOT is not cited in this document: AFL Reference Manual (same for && and ||)

I know that the explicit NOT, AND and OR are the recommended operators to use. Still, adding a short note about the alternatives will be a useful addition to the documentation.
This can avoid confusion for people unfamiliar with those "C" language operators, which, although rare, are sometimes used in formulas or code examples.

2 Likes
4

This topic was automatically closed 100 days after the last reply. New replies are no longer allowed.