When you're trying to establish what the resistance/support are for a stock, and even when trying to spot something like a double top, do the points on the stock chart need to exactly touch the price you're calling "resistance"? For example: a stock goes up to $4.31, then goes down to $4.11, then later that week it goes back up to $4.31, but then still goes back down. Would $4.31 still be considered the resistance if the stock only ONCE touched $4.31 but then only came close to it $4.25 the next time it retested $4.31?

 

The same question goes for other patterns like double tops where I'm wondering if both tops have to be at the exact same price: no higher, no lower. 

 

Thanks!