approx

Approximate equality with absolute tolerance

Name	Type	Description
`value`	field	Value to test
`target`	field	Target value to compare against
`tolerance`	float	Maximum allowed absolute difference (must be non-negative)

ABS(value - target) <= tolerance

approx(rsi(close, 14), 50, 2);  // TRUE when RSI is between 48 and 52

approx(close, 100, 0.5);  // TRUE when close is between 99.50 and 100.50

approx(ema(close, 8), ema(close, 21), 0.01);  // TRUE when the two EMAs are within 0.01 of each other

bool

For automatic tolerance based on magnitude, use the ~= operator instead (0.1% relative + 1e-9 absolute floor)