Binance BTC price?

[drgrah]

Does anyone know what or who's price Binance uses for BTC price for the pairings?  The reason I ask is:  I saw BTC rallying on GDAX, so I sold some IOTA for BTC.  BTC went up, IOTA didn't move, and now I can't get as much IOTA back as I had in the first place.  I didn't expect they used GDAX's price, because it's always higher, but where do they get their price for BTC?

[SONG GEET]

Can't get your point clearly but binance is trading platform so they don't take price from other bitcoin exchange platforms.

They have USDT-BTC pair where buyer/seller set orders to buy/sell bitcoin and bitcoin price there is in terms of USDT not interms of USD like in Gdax or coinbase.

USDT always tend to maintain 1:1 exchange rate with USD but sometime it might valued lower or higher than that.

IOTA-BTC pair might have moved up so you can't get equal amount of IOTA from those bitcoin you have got after selling IOTA in past.

[drgrah]

Can't get your point clearly but binance is trading platform so they don't take price from other bitcoin exchange platforms.

They have USDT-BTC pair where buyer/seller set orders to buy/sell bitcoin and bitcoin price there is in terms of USDT not interms of USD like in Gdax or coinbase.

USDT always tend to maintain 1:1 exchange rate with USD but sometime it might valued lower or higher than that.

IOTA-BTC pair might have moved up so you can't get equal amount of IOTA from those bitcoin you have got after selling IOTA in past.

I wrote a big long explanation, and then finally so the BTC/USDT price on there!  That explains a lot.  Does the BTC/USDT not move as much as the BTC/USD price?  I would have thought that if BTC/USD went up 10% then the BTC/USDT would too?
Thank you for your time.

[drgrah]

I guess the last question is: When they show the USD price for IOTA being $4.35, is that actual dollars or token $s?  I don't know how I'm EVER going to get my taxes done right!!