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Author Topic: CoinMarketCap.com - Market Cap Rankings of All Cryptocurrencies!  (Read 610388 times)
odin99
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December 23, 2013, 07:45:05 PM
 #701

gamecoin on http://coinmarketcap.com/ now
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December 23, 2013, 08:11:30 PM
 #702

Hi folks, this I initially posted as a separate topic but this thread perhaps a better place. With regards to some coinmarketcap shortcomings here I suggest possible ways to address them:

1. Market Cap is shown for all (pre-)mined coins, even if only a tiny percentage actually available for trading

-> e.g. for someone to push their newly designed coins to the top of the league, it would suffice to release a tiny percentage of them into the market, causing price squeezes due to shortage of supply. One could argue nothing wrong with that as the price is determined between market participants aware of supply shortages. However, the ranking in the league table vs coins with wide circulation is misplaced.

Suggestion -> supplement with a new ranking based on Traded Market Cap or a similar statistics (over a certain period across all available exchanges), e.g. Traded Market Cap (24h) = Traded Volume (24h) x Weighted (by volume) Average Traded Price (24h)
Let's see:
the trade volume of Bitcoin might be something like 70 000 the last 24hours(0.5% of the total supply). That's not much, sure, because many people use it for long time storing or trading. Now there is coming Quark, which gets traded with 2000btc (5% of the the total supply), because it is so new and every one waits for the big dump or pump. -> it will get over proportional high listed at coinmarketcap.com. And you have the problem, that 20% of Bitcoin are owned by Satoshi and he might never spend it. So should the total supply be decreased?
-> I think, this is no good idea.



Quote
2. The prices on less liquid exchanges are sometimes "manipulated", in that off-market transactions for small volumes are enacted

-> e.g if the market with reasonable size bid / offer for a certain coin is at $1.50 / $1.55, someone might sell tiny amounts to lower bidders at $0.50 without risking much. Yet such transactions come on record and distort both price and market cap history charts.

Suggestion -> for each coin introduce some reasonable minimum treshold trade size which is required for inclusion of that trade into the price and market cap statistics.
This was only with the new exchange "coinedup" an issue. When you make a sell order at 0.50$, you will sell at the best price which is $1.50, which will be the last traded price. All exchanges work like that. If not, this is a bug.


Quote
3. The % change in Market Cap is shown over the 24h period, e.g. every minute we look at % change to a different reference point.

-> e.g. even though 24h change might be interesting, the observed % change is then not comparable to the observed % change value several minutes or hours ago. This is irritating and gets substantially magnified when prices are volatile, or being manipulated as per above.

Suggestion -> use % change to a fixed time point of a day, such as 0:00 GMT. Perhaps this has been already discussed, so apologies if the community already actually agreed on the existing format.
Quote

That might be a good propose. I would change it like that: On the top you can change between dollar and btc. The same could work for percentage change week, day,hour,15min. And please, as an parameter in the url.


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December 23, 2013, 08:27:59 PM
 #703


1. Market Cap is shown for all (pre-)mined coins, even if only a tiny percentage actually available for trading

-> e.g. for someone to push their newly designed coins to the top of the league, it would suffice to release a tiny percentage of them into the market, causing price squeezes due to shortage of supply. One could argue nothing wrong with that as the price is determined between market participants aware of supply shortages. However, the ranking in the league table vs coins with wide circulation is misplaced.

Suggestion -> supplement with a new ranking based on Traded Market Cap or a similar statistics (over a certain period across all available exchanges), e.g. Traded Market Cap (24h) = Traded Volume (24h) x Weighted (by volume) Average Traded Price (24h)
Let's see:
the trade volume of Bitcoin might be something like 70 000 the last 24hours(0.5% of the total supply). That's not much, sure, because many people use it for long time storing or trading. Now there is coming Quark, which gets traded with 2000btc (5% of the the total supply), because it is so new and every one waits for the big dump or pump. -> it will get over proportional high listed at coinmarketcap.com. And you have the problem, that 20% of Bitcoin are owned by Satoshi and he might never spend it. So should the total supply be decreased?
-> I think, this is no good idea.
Quote

Thanks porcupine for your clear example. Still, some complementary metric to adjust for the market cap validity would be helpful.
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December 23, 2013, 10:47:03 PM
 #704

Added sorting options as requested.


Hello,

We are the first exchange for Mastercoin (the "on top of bitcoin" altcoin), www.masterxchange.com, which by capitalisation is currently around the 5th coin

We have made a JSON API that retrieves prices & trades :

https://masterxchange.com/api/trades.php returns the 500 last trades
https://masterxchange.com/api/orderbook.php returns the 500 best ask orders and the 500 best bid orders
https://masterxchange.com/api/supply.php return the total number of mastercoins in existence

Hope this is enough for you to include us on your site. If you need additional data or options please let me know.

Regards,

Emilien

I'm looking at the trades API and there seems to be very low volume (50 trades in 4 days).  Is that right?

We launched ~3 days ago, and manual trading systems are still quite active with mastercoins.

Right now there is really few trade the order book is still just building up.

Alright.  I'm a little hesitant to put to up a coin with such low volume but I suppose I can average all of the prices for now until volume picks up.




Maybe there is a compromise for this problem. Perhaps an astrix or notation disclosing that it is only traded on one proprietary exchange?

Kind of silly to compare coin values when all the other top 15 competitors are listed on at least 3 exchanges and those exchanges don't exclusively trade just one coin.


If you click through on the price link you can see all of the exchanges on which it is traded.



Hi folks, this I initially posted as a separate topic but this thread perhaps a better place. With regards to some coinmarketcap shortcomings here I suggest possible ways to address them:

1. Market Cap is shown for all (pre-)mined coins, even if only a tiny percentage actually available for trading

-> e.g. for someone to push their newly designed coins to the top of the league, it would suffice to release a tiny percentage of them into the market, causing price squeezes due to shortage of supply. One could argue nothing wrong with that as the price is determined between market participants aware of supply shortages. However, the ranking in the league table vs coins with wide circulation is misplaced.

Suggestion -> supplement with a new ranking based on Traded Market Cap or a similar statistics (over a certain period across all available exchanges), e.g. Traded Market Cap (24h) = Traded Volume (24h) x Weighted (by volume) Average Traded Price (24h)
Let's see:
the trade volume of Bitcoin might be something like 70 000 the last 24hours(0.5% of the total supply). That's not much, sure, because many people use it for long time storing or trading. Now there is coming Quark, which gets traded with 2000btc (5% of the the total supply), because it is so new and every one waits for the big dump or pump. -> it will get over proportional high listed at coinmarketcap.com. And you have the problem, that 20% of Bitcoin are owned by Satoshi and he might never spend it. So should the total supply be decreased?
-> I think, this is no good idea.



Quote
2. The prices on less liquid exchanges are sometimes "manipulated", in that off-market transactions for small volumes are enacted

-> e.g if the market with reasonable size bid / offer for a certain coin is at $1.50 / $1.55, someone might sell tiny amounts to lower bidders at $0.50 without risking much. Yet such transactions come on record and distort both price and market cap history charts.

Suggestion -> for each coin introduce some reasonable minimum treshold trade size which is required for inclusion of that trade into the price and market cap statistics.
This was only with the new exchange "coinedup" an issue. When you make a sell order at 0.50$, you will sell at the best price which is $1.50, which will be the last traded price. All exchanges work like that. If not, this is a bug.


Quote
3. The % change in Market Cap is shown over the 24h period, e.g. every minute we look at % change to a different reference point.

-> e.g. even though 24h change might be interesting, the observed % change is then not comparable to the observed % change value several minutes or hours ago. This is irritating and gets substantially magnified when prices are volatile, or being manipulated as per above.

Suggestion -> use % change to a fixed time point of a day, such as 0:00 GMT. Perhaps this has been already discussed, so apologies if the community already actually agreed on the existing format.
Quote

That might be a good propose. I would change it like that: On the top you can change between dollar and btc. The same could work for percentage change week, day,hour,15min. And please, as an parameter in the url.



Thanks for the feedback, I'll address each here:

1. I agree with Porcupine here.  What you're suggesting is an entirely new ranking, not marketcap.  However, I'm working on displaying volume figures so people can determine how much trading is supporting the marketcap figure.


2. I've already put in place price manipulation prevention for DGEX (Nxt) and Coined-up (DogeCoin).  I'll eventually switch to moving averages for all exchanges to smooth out the volatility.

3. Agreed that this needs to be improved.  Would averaging the last 21-27 hours (or something like that) be better?  If you pick a point in time such as 0:00 GMT, then at 1:00 GMT that's only reflecting a 1 hour change

Crypto-currency market cap rankings @ http://coinmarketcap.com
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December 23, 2013, 10:51:12 PM
 #705

btw, I'm having issues with the dgex.com API,  so if you see Nxt popping in and out, that's why.




Is there a link with the total supply count? It seems like each block generates a random number of coins, so I wouldn't be able to calculate it based on block height.

Crypto-currency market cap rankings @ http://coinmarketcap.com
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December 24, 2013, 12:40:39 AM
 #706



Hey Gliss. So we are working on getting an ABE that works for Lottocoin at this time. Hopefully it will be ready soon and either one of the other guys
or I will send it to you the moment it's ready.

I will ask about getting a coin count that is as accurate as possible. Dogecoin and a few of the others generate random coins per block also so hopefully
we can just use whatever method they did.

Thanks!
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December 24, 2013, 01:54:02 AM
 #707

Thanks Gliss!
I use your site every day. I think its great.

My only recommendation (without reading previous posts, I'm sure it's been said) is to maybe make a "%" marker (or graph for coins like QRK) of how much each coin has been pre-mined. A lot of newbies are unaware of various scamcoins out there.  Grin
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December 24, 2013, 02:09:33 AM
 #708

Premining doesn't make a coin a scam any more than allowing people with more money to purchase more mining power and get more coins as a result makes a coin a scam (this has been said more eloquently than I have on a previous page of this thread). Or consider Bitcoin and the fact almost no one was aware of it in 2009 -- does that make Bitcoin a scam? These arguments (and yours) have been made time and time again. It really is a good idea to read at least some of the thread before posting.

I would imagine a large percentage of CoinMarketCap.com users don't have the least bit of a clue what premining means or why/if it should matter and if they don't it probably won't be reflected in the prices of coins. I see plenty of successful coins on CoinMarketCap.com that had some premining or allocation of coins to investors or early adopters -- ultimately what we should care about is that our investments increase in value. Do you really care that a coin was premined if it's worth double next week what you paid this week? I sure wouldn't.

Thanks Gliss!
I use your site every day. I think its great.

My only recommendation (without reading previous posts, I'm sure it's been said) is to maybe make a "%" marker (or graph for coins like QRK) of how much each coin has been pre-mined. A lot of newbies are unaware of various scamcoins out there.  Grin
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December 24, 2013, 03:03:28 AM
 #709

Why don't you remove NXT? It's a scam coin

I may agree with you on this one. But I'm not sure.

Stats about the coin are wrong. It's not know how many coins are owned by the developer, and how many coins are actually in circulation (i.e how many has been 'mined' it's unknown). It does sound like a scam.

The developer is taking real money to give a coin he just made from air.


 
 
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December 24, 2013, 04:08:56 AM
 #710

NXT has to be there!  Cool

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December 24, 2013, 04:59:36 AM
 #711

Thanks Gliss!
I use your site every day. I think its great.

My only recommendation (without reading previous posts, I'm sure it's been said) is to maybe make a "%" marker (or graph for coins like QRK) of how much each coin has been pre-mined. A lot of newbies are unaware of various scamcoins out there.  Grin

Why don't you look at the block chains and figure it out for yourself?


 
 
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grv
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December 24, 2013, 08:20:31 AM
 #712

was something like this already suggested?
only include cryptocurrencies which are traded at least on "xx" number of long standing exchanges.
(and not if its only traded on 1-2 new shady "exchanges" with low volume which are created/selected solely for the purpose of market manipulation)

tips will be spent on ale and ladies of questionable character Grin
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December 24, 2013, 08:27:34 AM
 #713

was something like this already suggested?
only include cryptocurrencies which are traded at least on "xx" number of long standing exchanges.
(and not if its only traded on 1-2 new shady "exchanges" with low volume which are created/selected solely for the purpose of market manipulation)

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December 24, 2013, 08:45:20 AM
 #714

Thanks for removing nxt scam coin!
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December 24, 2013, 08:46:01 AM
 #715

earthcoin perhaps?

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December 24, 2013, 09:22:20 AM
 #716

As the proud owner of a newly launched exchange I would say we all need time to prove ourselves.

If you want crypto currencies to stay decentralized, a lot of exchanges is a good thing.

From what I see a lot of coins have a hard time getting featured on one exchange and especially those who are not a simple copy/past of Bitcoin. For me, building a Mastercoin exchange was an opportunity to get into this business by providing a valuable service (liquidity) to an interesting approach for an alt coin.
Of course the volume is low: people don't know us yet and are carefull - and given the number of scams out there they should be. But I'm confident it will grow with time.
Of course I only propose one pair: I want to make sure everything works as intended before rushing into other alt coins.

As for "scam coins", I guess it's each individual's responsibility to do is own research to determine if a coin is valuable or not.
I'm not affiliated with the Mastercoin foundation but I'll tell you Mastercoin is far from a scam. It's been out there since August, has been announced weeks in advance, has many great features and is supported by a strong community. It's been traded almost exclusively OTC but with our live exchange things will soon be way different.

So my point is: Mastercoin should be featured here.

Perhaps a good thing would be to include the volume traded in the last 24h / 7days to have a simple metric to represent the activity of the coin?

The first Mastercoin / Bitcoin exchange : https://masterxchange.com
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December 24, 2013, 09:54:19 AM
 #717



Hello Gliss.

Someone put up an ABE explorer for LOT :
http://lottocoin.info/
http://23.20.189.121/

Exchange-
Exchange : https://coinedup.com/OrderBook?market=LOT&base=BTC

Site-
http://lottocoin.org/

Is that adequate?

Thanks!
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December 24, 2013, 10:33:26 AM
 #718

Why in the hell did you guys add NXT back?

Its a total scam with rigged exchange, i dare you to go to this exchange, so called exchange from which you are picking up the price feed for marketcap site : http://dgex.com/  then click around and honestly ask yourself if you would want anyone putting their btc there.

Fake volume, so I can start my own exchange and mod some shitcoin and just price it to what ever i want?
wow come on, this cant be tolerated. Coins which are not accepted at at least 2 exchanges or traded on exchange set up by coin creators for the sole purpose of trading just that one coin, cant be trusted with price discovery this is absurd.

 unknown amount held by creators & created out of thin air then sold for real bitcoins to naive people who believe it is worth 20+ million $ in first few weeks , common if this coin stays on longer more abominations will follow.

 Please do all the new traders in this community a favor help them avoid this nonsense at least until this garbage is priced by a proper price discovery mechanism of the real market, not single coin exchange setup by people behind the coin itself.


Thanks

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December 24, 2013, 10:38:39 AM
 #719

Damm why this nxt is back... Its a total rip off! So you also support scam coins :-(( To bad..
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December 24, 2013, 11:45:48 AM
 #720

You guys got a link to the NXT drama?

Just because a coin is manipulated by someone shouldn’t discredit it, but obviously I don't know the full details.

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