diff --git a/rustybot/src/connectors.rs b/rustybot/src/connectors.rs
index 26aacfa..4757f7f 100644
--- a/rustybot/src/connectors.rs
+++ b/rustybot/src/connectors.rs
@@ -17,7 +17,7 @@ use tokio::time::Duration;
 use crate::currency::{Symbol, SymbolPair};
 use crate::models::{
     ActiveOrder, OrderBook, OrderBookEntry, OrderDetails, OrderFee, OrderForm, OrderKind, Position,
-    PositionState, PriceTicker, Trade, TradingPlatform, WalletKind,
+    PositionState, PriceTicker, Trade, TradingFees, TradingPlatform, WalletKind,
 };
 use crate::BoxError;
 
@@ -69,9 +69,9 @@ impl Client {
         // TODO: change fee with account's taker fee
         positions.iter_mut().flatten().for_each(|x| {
             if x.is_short() {
-                x.update_profit_loss(best_ask, 0.2);
+                x.update_profit_loss(best_ask, 0.075);
             } else {
-                x.update_profit_loss(best_bid, 0.2);
+                x.update_profit_loss(best_bid, 0.075);
             }
         });
 
@@ -153,6 +153,7 @@ pub trait Connector: Send + Sync {
         &self,
         pair: &SymbolPair,
     ) -> Result<Option<Vec<OrderDetails>>, BoxError>;
+    async fn trading_fees(&self) -> Result<Vec<TradingFees>, BoxError>;
 }
 
 impl Debug for dyn Connector {
@@ -189,7 +190,11 @@ impl BitfinexConnector {
         if pair.to_string().to_lowercase().contains("test") {
             format!("{}:{}", pair.base(), pair.quote())
         } else {
-            format!("{}{}", pair.base(), pair.quote())
+            if pair.to_string().to_lowercase().contains("f0") {
+                format!("{}:{}", pair.base(), pair.quote())
+            } else {
+                format!("{}{}", pair.base(), pair.quote())
+            }
         }
     }
 
@@ -279,9 +284,11 @@ impl Connector for BitfinexConnector {
         let order_form = match order.kind() {
             OrderKind::Limit { price, amount } => {
                 bitfinex::orders::OrderForm::new(symbol_name, price, amount, order.into())
+                    .with_leverage(15)
             }
-            OrderKind::Market { amount } => {
+            OrderKind::Market { amount, .. } => {
                 bitfinex::orders::OrderForm::new(symbol_name, 0.0, amount, order.into())
+                    .with_leverage(15)
             }
             OrderKind::Stop { price, amount } => {
                 bitfinex::orders::OrderForm::new(symbol_name, price, amount, order.into())
@@ -371,6 +378,10 @@ impl Connector for BitfinexConnector {
 
         Ok((!mapped_vec.is_empty()).then_some(mapped_vec))
     }
+
+    async fn trading_fees(&self) -> Result<Vec<TradingFees>, BoxError> {
+        unimplemented!()
+    }
 }
 
 impl From<&ActiveOrder> for CancelOrderForm {
@@ -439,7 +450,7 @@ impl From<&OrderForm> for bitfinex::orders::OrderKind {
                 OrderKind::FillOrKill { .. } => bitfinex::orders::OrderKind::ExchangeFok,
                 OrderKind::ImmediateOrCancel { .. } => bitfinex::orders::OrderKind::ExchangeIoc,
             },
-            TradingPlatform::Margin => match o.kind() {
+            TradingPlatform::Margin | TradingPlatform::Derivative => match o.kind() {
                 OrderKind::Limit { .. } => bitfinex::orders::OrderKind::Limit,
                 OrderKind::Market { .. } => bitfinex::orders::OrderKind::Market,
                 OrderKind::Stop { .. } => bitfinex::orders::OrderKind::Stop,