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Math problems

Discussion in 'Trading' started by pyro, Jun 8, 2003.

1. pyro

Hi

I need help with math

if I want to know the midprice of a range I do this:

{50% range}
(High + Low) *0.50

or a 75%

{75% range}
(High- (High-Low)*0.75)

Now, if I want do know the percentage between High and Close I do this:

((High-Close)/100)

My problem is the result that this formula give me.
Let's see with the S&P friday data.
((1008-988)/100)=0.20

That 0.20 indicates a 2% range but if we look tho the previous formulas the 0.50 and 0.75 indicates a 50% and a 75% respectively. So, that 0.20 could be read like 20% and not 2%, correct?

Can anybody help me with this problem? I'm going nuts with this

Thank you

2. TGregg

Midpoint of the day:

(high-low)*.5 + low

I'm not sure what you mean by 75% range, so I cannot give you a forumla for it.

Percentage between high and close would be either:

(high-close)/close (percent difference compared to close)
or
(high-close)/high (percent difference compared to high)

3. Hungry4Knowledg

I'm not exactly sure what you are asking, but try:

(High/Close-1)*100

1008/988 = 1.0202429149797570850202429149798

1.0202 - 1 = 0.0202

0.0202 * 100 = 2.02%

The high was 2.02% higher than the close.

4. swoop[TR]

1008-988/988 = 0.0202

Is that what you want ? That's the % difference between those two numbers.
If you want the midpoint:

1008+988 / 2 = 998

If you want the 3rd quartile:

988 + (1008-988 * 0.75) = 1003

I have no idea if that's what you want, but here si what i think is what you want.

5. Lobster

Or (if that one is still not complicated enough for you) you could use

(-high-low)*.5 + low + high

I personally prefer

(exp(2*i*pi)*high+ln(e)*low) / sqrt(4) * abs(sin(1.5*pi))

6. pyro

Thank you all for the precious help

Thank you

7. swoop[TR]

gotta love that last one Classic.

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