Quick math question.

[Bitcoin Swami]

I know this question might seem a bit dumb but how much does the price need to go up on mt. gox before I can sell at a profit with their normal fee.

Say I bought one btc at 10, how much would it have to rise.  6 cents?

[1714068777]

1714068777

[1714068777]

1714068777

[1714068777]

1714068777

[1714068777]

1714068777

[JoelKatz]

I know this question might seem a bit dumb but how much does the price need to go up on mt. gox before I can sell at a profit with their normal fee.

Say I bought one btc at 10, how much would it have to rise.  6 cents?

It takes a buy at $10.00 and a sell at $10.12 to break even.

Commission is (normally) .65%, so:

I buy 10 bitcoins at $10 each, cost is $100 plus $0.65 commission.

I sell 10 bitcoins at $10.12 each, I get $101.20 and pay $.55 commission.

Sell-Buy: $101.20 - $100 = $1.20
Total Commission: $1.20

Result: Breakeven

[Bitcoin Swami]

I know this question might seem a bit dumb but how much does the price need to go up on mt. gox before I can sell at a profit with their normal fee.

Say I bought one btc at 10, how much would it have to rise.  6 cents?

It takes a buy at $10.00 and a sell at $10.12 to break even.

Commission is (normally) .65%, so:

I buy 10 bitcoins at $10 each, cost is $100 plus $0.65 commission.

I sell 10 bitcoins at $10.12 each, I get $101.20 and pay $.55 commission.

Sell-Buy: $101.20 - $100 = $1.20
Total Commission: $1.20

Result: Breakeven

Thanks Joel I was still figuring the .3 percent commission so i was getting screwed up. 
Thanks alot.
Mike

[Bitcoin Swami]

I know this question might seem a bit dumb but how much does the price need to go up on mt. gox before I can sell at a profit with their normal fee.

Say I bought one btc at 10, how much would it have to rise.  6 cents?

It takes a buy at $10.00 and a sell at $10.12 to break even.

Commission is (normally) .65%, so:

I buy 10 bitcoins at $10 each, cost is $100 plus $0.65 commission.

I sell 10 bitcoins at $10.12 each, I get $101.20 and pay $.55 commission.

Sell-Buy: $101.20 - $100 = $1.20
Total Commission: $1.20

Result: Breakeven

One more question.  Has anyone made a calculator or chart online for quick reference when trading? instead of getting the ole windows (or linux) calculator out?)

[kiwiasian]

Not sure what you're asking.....just do BTC(USD)(99.35%) and that's your total profit

[Bitcoin Swami]

Not sure what you're asking.....just do BTC(USD)(99.35%) and that's your total profit

Guess I"m not totally sure what I'm asking either.  I was just thinking a chart where If I bought a bitcoin at 14 dollars it would just tell me the exact price i would need to sell at to break even (with fees included).  I'm sure it would take 2 seconds to program.  Is this a stupid idea? Am I too lazy? lol

[PatrickHarnett]

you could use your brain

[TiagoTiago]

Depending on the route the money takes, the comissions, taxes etc could be bigger for your roundtrip operation

[PatrickHarnett]

Gox charges 0.65% on each side, so very roughly on your $10 coin, 13 cents.  (More precisely, 13.08 cents.)

Have one BTC
Sell 1 at $10.1308, pay 0.06585 commission, have 10.065.  then
Buy 1 at 10.0000, pay 0.06500 commission, have one BTC and no $$

[piramida]

anything below 50 cents of volatility and you should not worry best up-and-down is after any big move, sell or buy does not matter. when the panic stops price goes up-down 1-2$ several times while seeking an average, that's the time to play.

[GeniuSxBoY]

If the price is $10. What price would you have to sell at to get $10?

x= what price?
fee= .65%
how many fees? 2 since you are trading in and trading out.
Remember, even if 1btc = $10 you only have .9935 after the trade.
If you cash out right now, you'll have to pay another fee .9935 x ($10) = $9.935 minus .65% = $9.8704225
So you lose twice the fee for trading in and trading out.

Shortcut:
x = price you need to sell at.
y = price you want to start.
Plug in y, solve for x.

x - (.65%*2*x) = y
x - (.65%*2*x) = 10
x - .0130x = 10
.987x = 10
x ~= 10.131712259371833839918946301925

A variance of 13 cents.

If we were trading at $20
x - (.65%*2*x) = y
x - (.65%*2*x) = 20
x - .0130x = 20
.987x = 20
x ~= 20.26342451874366767983789260385

A variance of 26 cents.



Longcut:
 X = current price, Y = Price you want to sell at to break even.
If X=10
($X - $X*.0065)/$X * ($Y - $Y*.0065)  = $X
($10 - $10*.0065)/$10 * ($Y - $Y*.0065)  = $10
.9935 * ($Y - $Y*.0065) = $10
($Y - $Y*.0065) = 10/.9935
.9935Y = 10/.9935
Y = 10/.9935/.9935
Y = 10/.9935^2
Y = 10.131278574954618204033312657082

[NothinG]

I know this question might seem a bit dumb but how much does the price need to go up on mt. gox before I can sell at a profit with their normal fee.

Say I bought one btc at 10, how much would it have to rise.  6 cents?

It takes a buy at $10.00 and a sell at $10.12 to break even.

Commission is (normally) .65%, so:

I buy 10 bitcoins at $10 each, cost is $100 plus $0.65 commission.

I sell 10 bitcoins at $10.12 each, I get $101.20 and pay $.55 commission.

Sell-Buy: $101.20 - $100 = $1.20
Total Commission: $1.20

Result: Breakeven

Hopefully I did this right
http://zombietoday.com/trade_calculator.php

Code:

<?php
echo "<center>What's the minimum price I would have to sell back at to break even?</center><br />";
if($_GET['volume']>0 && $_GET['ppb']>0 && is_numeric($_GET['volume']) && is_numeric($_GET['ppb']) && $_GET['fee']>0 && is_numeric($_GET['fee']))
{
	$volume = $_GET['volume'];
	$ppb = $_GET['ppb'];
	$fee = $_GET['fee'];
	$fee_c = ($fee / 1000); //yea, I know...decided to not use the full percentage
	$total_buy = $volume * $ppb;
	$min_sell = $total_buy + ($total_buy * $fee_c);
	
	echo "[Buy]: ".$total_buy."<br />";
	echo "[Sell]: ".$min_sell."<br /><Br />";
	echo "You paid ".$total_buy." USD for ".$volume." BTC; you will need to sell back at ".$min_sell." USD to break even.<br />";
	
} else {
	$mtGoxAVG = mtGoxAvg();
	echo "<form method=get>";
	echo "Buy <input type='text' name='volume' value='1' size='2'> @ <input type='text' name='ppb' value='".$mtGoxAVG."'><br />";
	echo "Fee 0.<input type='text' name='fee' value='65' size='1'>%<br /> ";
	echo "<input type='submit' value='calculate'></form>";	
}
function mtGoxAvg()
{
	$opts = array(
	  'http'=> array(
		'method'=>   "GET",
		'user_agent'=>    "MozillaXYZ/1.0"));
	$context = stream_context_create($opts);
	$json = file_get_contents('https://mtgox.com/code/data/ticker.php', false, $context);
	$jdec = json_decode($json);
	return $jdec->{'ticker'}->{'avg'};
}
?>

[edit]: I have no idea what I coded...lol. Modify it math nerds

[Bitcoin Swami]

I know this question might seem a bit dumb but how much does the price need to go up on mt. gox before I can sell at a profit with their normal fee.

Say I bought one btc at 10, how much would it have to rise.  6 cents?

It takes a buy at $10.00 and a sell at $10.12 to break even.

Commission is (normally) .65%, so:

I buy 10 bitcoins at $10 each, cost is $100 plus $0.65 commission.

I sell 10 bitcoins at $10.12 each, I get $101.20 and pay $.55 commission.

Sell-Buy: $101.20 - $100 = $1.20
Total Commission: $1.20

Result: Breakeven

Hopefully I did this right
http://zombietoday.com/trade_calculator.php

Code:

<?php
echo "<center>What's the minimum price I would have to sell back at to break even?</center><br />";
if($_GET['volume']>0 && $_GET['ppb']>0 && is_numeric($_GET['volume']) && is_numeric($_GET['ppb']) && $_GET['fee']>0 && is_numeric($_GET['fee']))
{
	$volume = $_GET['volume'];
	$ppb = $_GET['ppb'];
	$fee = $_GET['fee'];
	$fee_c = ($fee / 1000); //yea, I know...decided to not use the full percentage
	$total_buy = $volume * $ppb;
	$min_sell = $total_buy + ($total_buy * $fee_c);
	
	echo "[Buy]: ".$total_buy."<br />";
	echo "[Sell]: ".$min_sell."<br /><Br />";
	echo "You paid ".$total_buy." USD for ".$volume." BTC; you will need to sell back at ".$min_sell." USD to break even.<br />";
	
} else {
	$mtGoxAVG = mtGoxAvg();
	echo "<form method=get>";
	echo "Buy <input type='text' name='volume' value='1' size='2'> @ <input type='text' name='ppb' value='".$mtGoxAVG."'><br />";
	echo "Fee 0.<input type='text' name='fee' value='65' size='1'>%<br /> ";
	echo "<input type='submit' value='calculate'></form>";	
}
function mtGoxAvg()
{
	$opts = array(
	  'http'=> array(
		'method'=>   "GET",
		'user_agent'=>    "MozillaXYZ/1.0"));
	$context = stream_context_create($opts);
	$json = file_get_contents('https://mtgox.com/code/data/ticker.php', false, $context);
	$jdec = json_decode($json);
	return $jdec->{'ticker'}->{'avg'};
}
?>

[edit]: I have no idea what I coded...lol. Modify it math nerds

Perfect, exactly what I was talking about.  Except the math is wrong but I think you notice that.

[Elwar]

I know this question might seem a bit dumb but how much does the price need to go up on mt. gox before I can sell at a profit with their normal fee.

Say I bought one btc at 10, how much would it have to rise.  6 cents?

It takes a buy at $10.00 and a sell at $10.12 to break even.

Commission is (normally) .65%, so:

I buy 10 bitcoins at $10 each, cost is $100 plus $0.65 commission.

I sell 10 bitcoins at $10.12 each, I get $101.20 and pay $.55 commission.

Sell-Buy: $101.20 - $100 = $1.20
Total Commission: $1.20

Result: Breakeven

Hopefully I did this right
http://zombietoday.com/trade_calculator.php

Code:

<?php
echo "<center>What's the minimum price I would have to sell back at to break even?</center><br />";
if($_GET['volume']>0 && $_GET['ppb']>0 && is_numeric($_GET['volume']) && is_numeric($_GET['ppb']) && $_GET['fee']>0 && is_numeric($_GET['fee']))
{
	$volume = $_GET['volume'];
	$ppb = $_GET['ppb'];
	$fee = $_GET['fee'];
	$fee_c = ($fee / 1000); //yea, I know...decided to not use the full percentage
	$total_buy = $volume * $ppb;
	$min_sell = $total_buy + ($total_buy * $fee_c);
	
	echo "[Buy]: ".$total_buy."<br />";
	echo "[Sell]: ".$min_sell."<br /><Br />";
	echo "You paid ".$total_buy." USD for ".$volume." BTC; you will need to sell back at ".$min_sell." USD to break even.<br />";
	
} else {
	$mtGoxAVG = mtGoxAvg();
	echo "<form method=get>";
	echo "Buy <input type='text' name='volume' value='1' size='2'> @ <input type='text' name='ppb' value='".$mtGoxAVG."'><br />";
	echo "Fee 0.<input type='text' name='fee' value='65' size='1'>%<br /> ";
	echo "<input type='submit' value='calculate'></form>";	
}
function mtGoxAvg()
{
	$opts = array(
	  'http'=> array(
		'method'=>   "GET",
		'user_agent'=>    "MozillaXYZ/1.0"));
	$context = stream_context_create($opts);
	$json = file_get_contents('https://mtgox.com/code/data/ticker.php', false, $context);
	$jdec = json_decode($json);
	return $jdec->{'ticker'}->{'avg'};
}
?>

[edit]: I have no idea what I coded...lol. Modify it math nerds

Well done. It would help to add at the end "Price to sell back at to break even: "   eg. 10.12

[NothinG]

Well done. It would help to add at the end "Price to sell back at to break even: "   eg. 10.12

I wrote the script at 5am.

Give me a few minutes and I'll add that.

[Edit]:

http://zombietoday.com/trade_calculator.php

Code:

<?php
echo "<center>What's the minimum price I would have to sell back at to break even?</center><br />";
if($_GET['volume']>0 && $_GET['ppb']>0 && is_numeric($_GET['volume']) && is_numeric($_GET['ppb']) && $_GET['fee']>0 && is_numeric($_GET['fee']))
{
	$volume = $_GET['volume'];
	$ppb = $_GET['ppb'];
	$fee = $_GET['fee'];
	$fee_c = ($fee / 1000); //yea, I know...decided to not use the full percentage
	$total_buy = $volume * $ppb;
	$min_sell = $total_buy + ($total_buy * $fee_c);
	$minMarket_low_sell = ($min_sell / $volume);
	
	echo "[Volume]: ".$volume."<br />";
	echo "[Buy]: ".$total_buy."<br />";
	echo "[Sell]: ".$min_sell."<br /><Br />";
	echo "Minimum sell when Price Per Bitcoin is <u>".$minMarket_low_sell."USD</u> to break even.<br />";
	
} else {
	echo "<form method=get>";
	echo "Buy <input type='text' name='volume' value='1' size='2'> @ <input type='text' name='ppb' value='".mtGoxAvg()."'><br />";
	echo "Fee 0.<input type='text' name='fee' value='65' size='1'>%<br /> ";
	echo "<input type='submit' value='calculate'></form>";	
}

function mtGoxAvg()
{
	$opts = array(
	  'http'=> array(
		'method'=>   "GET",
		'user_agent'=>    "MozillaXYZ/1.0"));
	$context = stream_context_create($opts);
	$json = file_get_contents('https://mtgox.com/code/data/ticker.php', false, $context);
	$jdec = json_decode($json);
	return $jdec->{'ticker'}->{'avg'};
}
?>

Enjoy!

[Elwar]

Enjoy!

Perfect! Thanks.


One question though...where is everyone getting .65%?

When I trade on MtGox it shows:
Mt Gox charges a small fee (0.30%) for each trade.

And with .3% would it not be multiplying times .003? Or .006 for two trades.

So a transaction of buying 100 BTC at $10 would be $1000 with a break even point of $1006?

[NothinG]

Enjoy!

Perfect! Thanks.


One question though...where is everyone getting .65%?

When I trade on MtGox it shows:
Mt Gox charges a small fee (0.30%) for each trade.

And with .3% would it not be multiplying times .003? Or .006 for two trades.

So a transaction of buying 100 BTC at $10 would be $1000 with a break even point of $1006?

I had the assumption the fee was 0.65% per trade. That's why it's a modifiable field.
I'll make some more modifications I guess.

[Elwar]

Ahh, I see what is wrong.

You have: Fee: 0.[65]%  which uses 65 as a multiple. If you have a fee of just 0.[6] it uses 6 as a multiple.

So you have:

100 * 10 = 1000 with a selloff of 1065 for .65

and

100 * 10 = 1000 with a selloff of 1006 for .6

[xjosx]

Well done. It would help to add at the end "Price to sell back at to break even: "   eg. 10.12

I wrote the script at 5am.

Give me a few minutes and I'll add that.

[Edit]:
http://gyazo.com/ee34be5c37cce7747d2a1d2316ad3bc2.png
http://zombietoday.com/trade_calculator.php

Code:

<?php
echo "<center>What's the minimum price I would have to sell back at to break even?</center><br />";
if($_GET['volume']>0 && $_GET['ppb']>0 && is_numeric($_GET['volume']) && is_numeric($_GET['ppb']) && $_GET['fee']>0 && is_numeric($_GET['fee']))
{
	$volume = $_GET['volume'];
	$ppb = $_GET['ppb'];
	$fee = $_GET['fee'];
	$fee_c = ($fee / 1000); //yea, I know...decided to not use the full percentage
	$total_buy = $volume * $ppb;
	$min_sell = $total_buy + ($total_buy * $fee_c);
	$minMarket_low_sell = ($min_sell / $volume);
	
	echo "[Volume]: ".$volume."<br />";
	echo "[Buy]: ".$total_buy."<br />";
	echo "[Sell]: ".$min_sell."<br /><Br />";
	echo "Minimum sell when Price Per Bitcoin is <u>".$minMarket_low_sell."USD</u> to break even.<br />";
	
} else {
	echo "<form method=get>";
	echo "Buy <input type='text' name='volume' value='1' size='2'> @ <input type='text' name='ppb' value='".mtGoxAvg()."'><br />";
	echo "Fee 0.<input type='text' name='fee' value='65' size='1'>%<br /> ";
	echo "<input type='submit' value='calculate'></form>";	
}

function mtGoxAvg()
{
	$opts = array(
	  'http'=> array(
		'method'=>   "GET",
		'user_agent'=>    "MozillaXYZ/1.0"));
	$context = stream_context_create($opts);
	$json = file_get_contents('https://mtgox.com/code/data/ticker.php', false, $context);
	$jdec = json_decode($json);
	return $jdec->{'ticker'}->{'avg'};
}
?>

Enjoy!

Are you sure the math is right? As stated in Joel's post, a $0.12 spread at $10 is enough to break even. According to yours, a $0.67 spread is required... That can't be right.

[Elwar]

Works perfectly if you just use a single digit.

Or 6.5