BTC-E Arbitrage Indicator

<?php
function btce_query($method, array $req = array()) {

        static $ch = null;
        if (is_null($ch)) {
                $ch = curl_init();
                curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
                curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; BTCE PHP client; '.php_uname('s').'; PHP/'.phpversion().')');
        }
        curl_setopt($ch, CURLOPT_URL, 'https://btc-e.ru/tapi/');
        curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);

        // run the query
        $res = curl_exec($ch);
        if ($res === false) throw new Exception('Could not get reply: '.curl_error($ch));
        $dec = json_decode($res, true);
        if (!$dec) throw new Exception('Invalid data received, please make sure connection is working and requested API exists');
        return $dec;
}


function GetJsonFeed($json_url)
{
    $feed = file_get_contents($json_url);
    return json_decode($feed, true);
}
$BTC_RUR = GetJsonFeed("http://btc-e.com/api/2/btc_rur/ticker");
$BTC_RUR_SELL = $BTC_RUR["ticker"]["sell"];
$BTC_RUR_BUY = $BTC_RUR["ticker"]["buy"];
// LTC - RUR
$LTC_RUR = GetJsonFeed("http://btc-e.com/api/2/ltc_rur/ticker");
$LTC_RUR_SELL = $LTC_RUR["ticker"]["sell"];
$LTC_RUR_BUY = $LTC_RUR["ticker"]["buy"];
// USD - RUR
$USD_RUR = GetJsonFeed("http://btc-e.com/api/2/usd_rur/ticker");
$USD_RUR_SELL = $USD_RUR["ticker"]["sell"];
$USD_RUR_BUY = $USD_RUR["ticker"]["buy"];
// BTC -  EUR
$BTC_EUR = GetJsonFeed("http://btc-e.com/api/2/btc_eur/ticker");
$BTC_EUR_SELL = $BTC_EUR["ticker"]["sell"];
$BTC_EUR_BUY = $BTC_EUR["ticker"]["buy"];
// LTC - BTC
$LTC_BTC = GetJsonFeed("http://btc-e.com/api/2/ltc_btc/ticker");
$LTC_BTC_SELL = $LTC_BTC["ticker"]["sell"];
$LTC_BTC_BUY = $LTC_BTC["ticker"]["buy"];
// EUR - USD
$EUR_USD = GetJsonFeed("http://btc-e.com/api/2/eur_usd/ticker");
$EUR_USD_SELL = $EUR_USD["ticker"]["sell"];
$EUR_USD_BUY = $EUR_USD["ticker"]["buy"];
// LTC - USD
$LTC_USD = GetJsonFeed("http://btc-e.com/api/2/ltc_usd/ticker");
$LTC_USD_SELL = $LTC_USD["ticker"]["sell"];
$LTC_USD_BUY = $LTC_USD["ticker"]["buy"];
// BTC - USD
$BTC_USD = GetJsonFeed("http://btc-e.com/api/2/btc_usd/ticker");
$BTC_USD_SELL = $BTC_USD["ticker"]["sell"];
$BTC_USD_BUY = $BTC_USD["ticker"]["buy"];
// Possible Conversions
// BTC -> LTC, USD, EUR, RUR
// LTC -> USD, RUR
// USD -> RUR, EUR

echo('<meta http-equiv="refresh" content="5">');
echo "<center><pre>";
echo "SELL / BUY</br>";
echo "BTC -> USD : ".$BTC_USD_SELL." / ".$BTC_USD_BUY."</br>";
echo "BTC -> RUR : ".$BTC_RUR_SELL." / ".$BTC_RUR_BUY."</br>";
echo "BTC -> EUR : ".$BTC_EUR_SELL." / ".$BTC_EUR_BUY."</br>";
echo "LTC -> BTC : ".$LTC_BTC_SELL." / ".$LTC_BTC_BUY."</br>";
echo "LTC -> USD : ".$LTC_USD_SELL." / ".$LTC_USD_BUY."</br>";
echo "LTC -> RUR : ".$LTC_RUR_SELL." / ".$LTC_RUR_BUY."</br>";
echo "USD -> RUR : ".$USD_RUR_SELL." / ".$USD_RUR_BUY."</br>";
echo "EUR -> USD : ".$EUR_USD_SELL." / ".$EUR_USD_BUY."</br>";

echo "</br>~ Trade ~";
echo "</br><a href='#'>1 BTC -> USD</a> - <a href='#'>BTC <- ALL USD</a>";
echo "</br><a href='#'>1 BTC -> RUR</a> - <a href='#'>BTC <- ALL RUR</a>";
echo "</br><a href='#'>1 BTC -> EUR</a> - <a href='#'>BTC <- ALL EUR</a>";
echo "</br><a href='#'>1 BTC -> LTC</a> - <a href='#'>BTC <- ALL LTC</a>";
echo "</br><a href='#'>ALL LTC -> USD</a> - <a href='#'>LTC <- ALL USD</a>";
echo "</br><a href='#'>ALL LTC -> RUR</a> - <a href='#'>LTC <- ALL RUR</a>";
echo "</br><a href='#'>ALL USD -> RUR</a> - <a href='#'>USD <- ALL RUR</a>";
echo "</br><a href='#'>ALL EUR -> USD</a> - <a href='#'>EUR <- ALL USD</a>";

echo "</br></br>~Arbitrage~</br>";
// BTC -> LTC -> USD -> EUR -> BTC
$BTC_LTC_USD_EUR_BTC = 1 / $LTC_BTC_BUY * 0.998 * $LTC_USD_SELL * 0.998 / $EUR_USD_BUY * 0.998 / $BTC_EUR_BUY * 0.998;
if ($BTC_LTC_USD_EUR_BTC > 1.01) { echo "<script>alert('Arbitrage Found!')</script>BTC -> LTC -> USD -> EUR -> BTC - ".$BTC_LTC_USD_EUR_BTC."</br>"; echo "<title>Arbitrage Found</title>"; };
// BTC -> LTC -> USD -> RUR -> BTC
$BTC_LTC_USD_RUR_BTC = 1 / $LTC_BTC_BUY * 0.998 * $LTC_USD_SELL * 0.998 * $USD_RUR_SELL * 0.995 / $BTC_RUR_BUY * 0.998;
if ($BTC_LTC_USD_RUR_BTC > 1.01) { echo "<script>alert('Arbitrage Found!')</script>BTC -> LTC -> USD -> RUR -> BTC - ".$BTC_LTC_USD_RUR_BTC."</br>"; echo "<title>Arbitrage Found</title>"; };
// BTC -> LTC -> RUR -> USD -> BTC
$BTC_LTC_RUR_USD_BTC = 1 / $LTC_BTC_BUY * 0.998 * $LTC_RUR_SELL * 0.995 / $USD_RUR_BUY * 0.995 / $BTC_USD_BUY * 0.998;
if ($BTC_LTC_RUR_USD_BTC > 1.01) { echo "<script>alert('Arbitrage Found!')</script>BTC -> LTC -> RUR -> USD -> BTC - ".$BTC_LTC_RUR_USD_BTC."</br>"; echo "<title>Arbitrage Found</title>"; };
// BTC -> USD -> RUR -> LTC -> BTC
$BTC_USD_RUR_LTC_BTC = 1 * $BTC_USD_SELL * 0.998 * $USD_RUR_SELL * 0.995 / $LTC_RUR_BUY * 0.998 * $LTC_BTC_SELL * 0.995;
if ($BTC_USD_RUR_LTC_BTC > 1.01) { echo "<script>alert('Arbitrage Found!')</script>BTC -> USD -> RUR -> LTC -> BTC - ".$BTC_USD_RUR_LTC_BTC."</br>"; echo "<title>Arbitrage Found</title>"; };
// BTC -> USD -> LTC -> RUR -> BTC
$BTC_USD_LTC_RUR_BTC = 1 * $BTC_USD_SELL * 0.998 / $LTC_USD_BUY * 0.998 * $LTC_RUR_SELL * 0.998 / $BTC_RUR_BUY * 0.998;
if ($BTC_USD_LTC_RUR_BTC > 1.01) { echo "<script>alert('Arbitrage Found!')</script>BTC -> USD -> LTC -> RUR -> BTC - ".$BTC_USD_LTC_RUR_BTC."</br>"; echo "<title>Arbitrage Found</title>"; };
// BTC -> RUR -> USD -> LTC -> BTC
$BTC_RUR_USD_LTC_BTC = 1 * $BTC_RUR_SELL * 0.998 / $USD_RUR_BUY * 0.995 / $LTC_USD_BUY * 0.998 * $LTC_BTC_SELL * 0.998;
if ($BTC_RUR_USD_LTC_BTC > 1.01) { echo "<script>alert('Arbitrage Found!')</script>BTC -> RUR -> USD -> LTC -> BTC - ".$BTC_RUR_USD_LTC_BTC."</br>"; echo "<title>Arbitrage Found</title>"; };
// BTC -> RUR -> LTC -> USD -> BTC
$BTC_RUR_LTC_USD_BTC = 1 * $BTC_RUR_SELL * 0.998 / $LTC_RUR_BUY * 0.998 * $LTC_USD_BUY * 0.998 / $BTC_USD_BUY * 0.998;
if ($BTC_RUR_LTC_USD_BTC > 1.01) { echo "<script>alert('Arbitrage Found!')</script>BTC -> RUR -> LTC -> USD -> BTC - ".$BTC_RUR_LTC_USD_BTC."</br>"; echo "<title>Arbitrage Found</title>"; };

// BTC -> EUR -> USD -> BTC
$BTC_EUR_USD_BTC = 1 * $BTC_EUR_SELL * 0.998 * $EUR_USD_SELL * 0.998 / $BTC_USD_BUY * 0.998;
if ($BTC_EUR_USD_BTC > 1.01) { echo "<script>alert('Arbitrage Found!')</script>BTC -> EUR -> USD -> BTC - ".$BTC_EUR_USD_BTC."</br>"; echo "<title>Arbitrage Found</title>"; };
// BTC -> USD -> EUR -> BTC
$BTC_USD_EUR_BTC = 1 * $BTC_USD_SELL * 0.998 / $EUR_USD_BUY * 0.998 / $BTC_EUR_BUY * 0.998;
if ($BTC_USD_EUR_BTC > 1.01) { echo "<script>alert('Arbitrage Found!')</script>BTC -> USD -> EUR -> BTC - ".$BTC_USD_EUR_BTC."</br>"; echo "<title>Arbitrage Found</title>"; };

// BTC -> RUR -> USD -> BTC
$BTC_RUR_USD_BTC = 1 * $BTC_RUR_SELL * 0.998 / $USD_RUR_BUY * 0.995 / $BTC_USD_BUY * 0.998;
if ($BTC_RUR_USD_BTC > 1.01) { echo "<script>alert('Arbitrage Found!')</script>BTC -> RUR -> USD -> BTC - ".$BTC_RUR_USD_BTC."</br>"; echo "<title>Arbitrage Found</title>"; };
// BTC -> USD -> RUR -> BTC
$BTC_USD_RUR_BTC = 1 * $BTC_USD_SELL * 0.998 * $USD_RUR_SELL * 0.995 / $BTC_RUR_BUY * 0.998;
if ($BTC_USD_RUR_BTC > 1.01) { echo "<script>alert('Arbitrage Found!')</script>BTC -> USD -> RUR -> BTC - ".$BTC_USD_RUR_BTC."</br>"; echo "<title>Arbitrage Found</title>"; };

// BTC -> LTC -> USD -> BTC
$BTC_LTC_USD_BTC = 1 / $LTC_BTC_BUY * 0.998 * $LTC_USD_SELL * 0.998 / $BTC_USD_BUY * 0.998;
if ($BTC_LTC_USD_BTC > 1.01) { echo "<script>alert('Arbitrage Found!')</script>BTC -> LTC -> USD -> BTC - ".$BTC_LTC_USD_BTC."</br>"; echo "<title>Arbitrage Found</title>"; };
// BTC -> USD -> LTC -> BTC
$BTC_USD_LTC_BTC = 1 * $BTC_USD_SELL * 0.998 / $LTC_USD_BUY * 0.998 * $LTC_BTC_SELL * 0.998;
if ($BTC_USD_LTC_BTC > 1.01) { echo "<script>alert('Arbitrage Found!')</script>BTC -> USD -> LTC -> BTC - ".$BTC_USD_LTC_BTC."</br>"; echo "<title>Arbitrage Found</title>"; };

echo "</pre></center>";
echo "<title>No Arbitrage</title>";
?>