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The bitcoin I trade is on Gdax

This may be what you are looking for https://support.gdax.com/customer/en/portal/articles/2425097-what-are-the-fees-on-gdax-

or maybe this
https://www.gdax.com/fees/BTC-USD

I thought you were using Poloniex not gdax.

The Trading system is based using the number of accounts that are using Poloniex at 7:00 AM EST this is the data used to make the chart columns and the trading system . The Red line on the chart is the Bitcoin Price from GDAX at 7:00 AM EST . . But you cannot trade USD to Bitcoin on poloniex so I trade Bitcoin to USD on GDAX

Coin Marketplace

STEEM 0.20
TRX 0.13
JST 0.030
BTC 63713.30
ETH 3389.19
USDT 1.00
SBD 2.62