diff --git a/alphapointhttp.go b/alphapointhttp.go
index 13f17a9f..656d2bef 100644
--- a/alphapointhttp.go
+++ b/alphapointhttp.go
@@ -365,7 +365,7 @@ func (a *Alphapoint) WithdrawCoins(symbol, product string, amount float64, addre
 	request := make(map[string]interface{})
 	request["ins"] = symbol
 	request["product"] = product
-	request["amount"] = strconv.FormatFloat(amount, 'f', 8, 64)
+	request["amount"] = strconv.FormatFloat(amount, 'f', -1, 64)
 	request["sendToAddress"] = address
 
 	type Response struct {
@@ -390,8 +390,8 @@ func (a *Alphapoint) CreateOrder(symbol, side string, orderType int, quantity, p
 	request["ins"] = symbol
 	request["side"] = side
 	request["orderType"] = orderType
-	request["qty"] = strconv.FormatFloat(quantity, 'f', 8, 64)
-	request["px"] = strconv.FormatFloat(price, 'f', 2, 64)
+	request["qty"] = strconv.FormatFloat(quantity, 'f', -1, 64)
+	request["px"] = strconv.FormatFloat(price, 'f', -1, 64)
 
 	type Response struct {
 		ServerOrderID int64   `json:"serverOrderId"`
diff --git a/bitstamphttp.go b/bitstamphttp.go
index f7aa2cf8..e7e19cb6 100644
--- a/bitstamphttp.go
+++ b/bitstamphttp.go
@@ -220,8 +220,8 @@ func (b *Bitstamp) GetOpenOrders() {
 
 func (b *Bitstamp) PlaceOrder(price float64, amount float64, Type int) {
 	var req = url.Values{}
-	req.Add("amount", strconv.FormatFloat(amount, 'f', 8, 64))
-	req.Add("price", strconv.FormatFloat(price, 'f', 2, 64))
+	req.Add("amount", strconv.FormatFloat(amount, 'f', -1, 64))
+	req.Add("price", strconv.FormatFloat(price, 'f', -1, 64))
 	orderType := BITSTAMP_API_BUY
 
 	if Type == 1 {
@@ -247,7 +247,7 @@ func (b *Bitstamp) GetWithdrawalRequests() {
 
 func (b *Bitstamp) BitcoinWithdrawal(amount float64, address string) {
 	var req = url.Values{}
-	req.Add("amount", strconv.FormatFloat(amount, 'f', 8, 64))
+	req.Add("amount", strconv.FormatFloat(amount, 'f', -1, 64))
 	req.Add("address", address)
 
 	err := b.SendAuthenticatedHTTPRequest(BITSTAMP_API_BITCOIN_WITHDRAWAL, req, nil)
@@ -275,7 +275,7 @@ func (b *Bitstamp) UnconfirmedBitcoin() {
 
 func (b *Bitstamp) RippleWithdrawal(amount float64, address, currency string) {
 	var req = url.Values{}
-	req.Add("amount", strconv.FormatFloat(amount, 'f', 8, 64))
+	req.Add("amount", strconv.FormatFloat(amount, 'f', -1, 64))
 	req.Add("address", address)
 	req.Add("currency", currency)
 
diff --git a/btcchinahttp.go b/btcchinahttp.go
index 44fa5844..90bd8835 100644
--- a/btcchinahttp.go
+++ b/btcchinahttp.go
@@ -313,8 +313,8 @@ func (b *BTCChina) GetAccountInfo(infoType string) {
 
 func (b *BTCChina) PlaceOrder(buyOrder bool, price, amount float64, market string) {
 	params := make([]interface{}, 0)
-	params = append(params, strconv.FormatFloat(price, 'f', 2, 64))
-	params = append(params, strconv.FormatFloat(amount, 'f', 8, 64))
+	params = append(params, strconv.FormatFloat(price, 'f', -1, 64))
+	params = append(params, strconv.FormatFloat(amount, 'f', -1, 64))
 
 	if len(market) > 0 {
 		params = append(params, market)
@@ -507,10 +507,10 @@ func (b *BTCChina) RequestWithdrawal(currency string, amount float64) {
 
 func (b *BTCChina) IcebergOrder(buyOrder bool, price, amount, discAmount, variance float64, market string) {
 	params := make([]interface{}, 0)
-	params = append(params, strconv.FormatFloat(price, 'f', 2, 64))
-	params = append(params, strconv.FormatFloat(amount, 'f', 8, 64))
-	params = append(params, strconv.FormatFloat(discAmount, 'f', 2, 64))
-	params = append(params, strconv.FormatFloat(variance, 'f', 2, 64))
+	params = append(params, strconv.FormatFloat(price, 'f', -1, 64))
+	params = append(params, strconv.FormatFloat(amount, 'f', -1, 64))
+	params = append(params, strconv.FormatFloat(discAmount, 'f', -1, 64))
+	params = append(params, strconv.FormatFloat(variance, 'f', -1, 64))
 
 	if len(market) > 0 {
 		params = append(params, market)
@@ -587,15 +587,15 @@ func (b *BTCChina) PlaceStopOrder(buyOder bool, stopPrice, price, amount, traili
 		params = append(params, stopPrice)
 	}
 
-	params = append(params, strconv.FormatFloat(price, 'f', 2, 64))
-	params = append(params, strconv.FormatFloat(amount, 'f', 8, 64))
+	params = append(params, strconv.FormatFloat(price, 'f', -1, 64))
+	params = append(params, strconv.FormatFloat(amount, 'f', -1, 64))
 
 	if trailingAmt > 0 {
-		params = append(params, strconv.FormatFloat(trailingAmt, 'f', 2, 64))
+		params = append(params, strconv.FormatFloat(trailingAmt, 'f', -1, 64))
 	}
 
 	if trailingPct > 0 {
-		params = append(params, strconv.FormatFloat(trailingPct, 'f', 2, 64))
+		params = append(params, strconv.FormatFloat(trailingPct, 'f', -1, 64))
 	}
 
 	if len(market) > 0 {
diff --git a/btcehttp.go b/btcehttp.go
index 9c3d32c5..19b9cf1a 100644
--- a/btcehttp.go
+++ b/btcehttp.go
@@ -222,8 +222,8 @@ func (b *BTCE) Trade(pair, orderType string, amount, price float64) {
 	req := url.Values{}
 	req.Add("pair", pair)
 	req.Add("type", orderType)
-	req.Add("amount", strconv.FormatFloat(amount, 'f', 8, 64))
-	req.Add("rate", strconv.FormatFloat(price, 'f', 2, 64))
+	req.Add("amount", strconv.FormatFloat(amount, 'f', -1, 64))
+	req.Add("rate", strconv.FormatFloat(price, 'f', -1, 64))
 
 	err := b.SendAuthenticatedHTTPRequest(BTCE_TRADE, req)
 
diff --git a/coinbasehttp.go b/coinbasehttp.go
index 96e759b4..2bfdfd38 100644
--- a/coinbasehttp.go
+++ b/coinbasehttp.go
@@ -463,8 +463,8 @@ func (c *Coinbase) PlaceOrder(clientRef string, price, amount float64, side stri
 		request["client_oid"] = clientRef
 	}
 
-	request["price"] = strconv.FormatFloat(price, 'f', 2, 64)
-	request["size"] = strconv.FormatFloat(amount, 'f', 8, 64)
+	request["price"] = strconv.FormatFloat(price, 'f', -1, 64)
+	request["size"] = strconv.FormatFloat(amount, 'f', -1, 64)
 	request["side"] = side
 	request["product_id"] = productID
 
@@ -574,7 +574,7 @@ func (c *Coinbase) GetFills(params url.Values) {
 func (c *Coinbase) Transfer(transferType string, amount float64, accountID string) {
 	request := make(map[string]interface{})
 	request["type"] = transferType
-	request["amount"] = strconv.FormatFloat(amount, 'f', 8, 64)
+	request["amount"] = strconv.FormatFloat(amount, 'f', -1, 64)
 	request["coinbase_account_id"] = accountID
 
 	err := c.SendAuthenticatedHTTPRequest("POST", COINBASE_API_URL+COINBASE_TRANSFERS, request, nil)
diff --git a/cryptsyhttp.go b/cryptsyhttp.go
index 574649fc..953c3022 100644
--- a/cryptsyhttp.go
+++ b/cryptsyhttp.go
@@ -409,8 +409,8 @@ func (c *Cryptsy) CreateOrder(marketid, orderType string, amount, price float64)
 	req := url.Values{}
 	req.Set("marketid", marketid)
 	req.Set("ordertype", orderType)
-	req.Set("quantity", strconv.FormatFloat(amount, 'f', 8, 64))
-	req.Set("price", strconv.FormatFloat(amount, 'f', 8, 64))
+	req.Set("quantity", strconv.FormatFloat(amount, 'f', -1, 64))
+	req.Set("price", strconv.FormatFloat(amount, 'f', -1, 64))
 
 	err := c.SendAuthenticatedHTTPRequest("POST", CRYPTSY_API_URL+CRYPTSY_ORDER, req)
 
@@ -441,10 +441,10 @@ func (c *Cryptsy) CreateTrigger(marketid int64, orderType string, quantity float
 	req := url.Values{}
 	req.Set("marketid", strconv.FormatInt(marketid, 10))
 	req.Set("type", orderType)
-	req.Set("quantity", strconv.FormatFloat(quantity, 'f', 8, 64))
+	req.Set("quantity", strconv.FormatFloat(quantity, 'f', -1, 64))
 	req.Set("comparison", comparison)
-	req.Set("price", strconv.FormatFloat(price, 'f', 8, 64))
-	req.Set("orderprice", strconv.FormatFloat(orderprice, 'f', 8, 64))
+	req.Set("price", strconv.FormatFloat(price, 'f', -1, 64))
+	req.Set("orderprice", strconv.FormatFloat(orderprice, 'f', -1, 64))
 
 	if expires > 0 {
 		req.Set("expires", strconv.FormatInt(expires, 10))
diff --git a/huobihttp.go b/huobihttp.go
index 4fcefd54..042f2559 100644
--- a/huobihttp.go
+++ b/huobihttp.go
@@ -157,8 +157,8 @@ func (h *HUOBI) Trade(orderType string, coinType int, price, amount float64) {
 		orderType = "sell"
 	}
 	values.Set("coin_type", strconv.Itoa(coinType))
-	values.Set("amount", strconv.FormatFloat(amount, 'f', 8, 64))
-	values.Set("price", strconv.FormatFloat(price, 'f', 8, 64))
+	values.Set("amount", strconv.FormatFloat(amount, 'f', -1, 64))
+	values.Set("price", strconv.FormatFloat(price, 'f', -1, 64))
 	err := h.SendAuthenticatedRequest(orderType, values)
 
 	if err != nil {
@@ -172,8 +172,8 @@ func (h *HUOBI) MarketTrade(orderType string, coinType int, price, amount float6
 		orderType = "sell_market"
 	}
 	values.Set("coin_type", strconv.Itoa(coinType))
-	values.Set("amount", strconv.FormatFloat(amount, 'f', 8, 64))
-	values.Set("price", strconv.FormatFloat(price, 'f', 8, 64))
+	values.Set("amount", strconv.FormatFloat(amount, 'f', -1, 64))
+	values.Set("price", strconv.FormatFloat(price, 'f', -1, 64))
 	err := h.SendAuthenticatedRequest(orderType, values)
 
 	if err != nil {
@@ -196,8 +196,8 @@ func (h *HUOBI) ModifyOrder(orderType string, coinType, orderID int, price, amou
 	values := url.Values{}
 	values.Set("coin_type", strconv.Itoa(coinType))
 	values.Set("id", strconv.Itoa(orderID))
-	values.Set("amount", strconv.FormatFloat(amount, 'f', 8, 64))
-	values.Set("price", strconv.FormatFloat(price, 'f', 8, 64))
+	values.Set("amount", strconv.FormatFloat(amount, 'f', -1, 64))
+	values.Set("price", strconv.FormatFloat(price, 'f', -1, 64))
 	err := h.SendAuthenticatedRequest("modify_order", values)
 
 	if err != nil {
diff --git a/itbithttp.go b/itbithttp.go
index b3399427..a3f00386 100644
--- a/itbithttp.go
+++ b/itbithttp.go
@@ -223,8 +223,8 @@ func (i *ItBit) PlaceWalletOrder(walletID, side, orderType, currency string, amo
 	params["side"] = side
 	params["type"] = orderType
 	params["currency"] = currency
-	params["amount"] = strconv.FormatFloat(amount, 'f', 8, 64)
-	params["price"] = strconv.FormatFloat(price, 'f', 2, 64)
+	params["amount"] = strconv.FormatFloat(amount, 'f', -1, 64)
+	params["price"] = strconv.FormatFloat(price, 'f', -1, 64)
 	params["instrument"] = instrument
 
 	if clientRef != "" {
@@ -287,7 +287,7 @@ func (i *ItBit) WalletTransfer(walletID, sourceWallet, destWallet string, amount
 	params := make(map[string]interface{})
 	params["sourceWalletId"] = sourceWallet
 	params["destinationWalletId"] = destWallet
-	params["amount"] = strconv.FormatFloat(amount, 'f', 8, 64)
+	params["amount"] = strconv.FormatFloat(amount, 'f', -1, 64)
 	params["currencyCode"] = currency
 
 	err := i.SendAuthenticatedHTTPRequest("POST", path, params)
diff --git a/kraken.go b/kraken.go
index c7de428c..fef1e055 100644
--- a/kraken.go
+++ b/kraken.go
@@ -525,11 +525,11 @@ func (k *Kraken) AddOrder(symbol, side, orderType string, price, price2, volume,
 	values.Set("pairs", symbol)
 	values.Set("type", side)
 	values.Set("ordertype", orderType)
-	values.Set("price", strconv.FormatFloat(price, 'f', 2, 64))
-	values.Set("price2", strconv.FormatFloat(price, 'f', 2, 64))
-	values.Set("volume", strconv.FormatFloat(volume, 'f', 2, 64))
-	values.Set("leverage", strconv.FormatFloat(leverage, 'f', 2, 64))
-	values.Set("position", strconv.FormatFloat(position, 'f', 2, 64))
+	values.Set("price", strconv.FormatFloat(price, 'f', -1, 64))
+	values.Set("price2", strconv.FormatFloat(price, 'f', -1, 64))
+	values.Set("volume", strconv.FormatFloat(volume, 'f', -1, 64))
+	values.Set("leverage", strconv.FormatFloat(leverage, 'f', -1, 64))
+	values.Set("position", strconv.FormatFloat(position, 'f', -1, 64))
 
 	result, err := k.SendAuthenticatedHTTPRequest(KRAKEN_ORDER_PLACE, values)
 
diff --git a/lakebtchttp.go b/lakebtchttp.go
index ea499a21..31d68774 100644
--- a/lakebtchttp.go
+++ b/lakebtchttp.go
@@ -160,7 +160,7 @@ func (l *LakeBTC) GetAccountInfo() {
 }
 
 func (l *LakeBTC) Trade(orderType int, amount, price float64, currency string) {
-	params := strconv.FormatFloat(price, 'f', 8, 64) + "," + strconv.FormatFloat(amount, 'f', 8, 64) + "," + currency
+	params := strconv.FormatFloat(price, 'f', -1, 64) + "," + strconv.FormatFloat(amount, 'f', -1, 64) + "," + currency
 	err := errors.New("")
 
 	if orderType == 0 {
diff --git a/okcoinhttp.go b/okcoinhttp.go
index d5b6c806..3f0868ac 100644
--- a/okcoinhttp.go
+++ b/okcoinhttp.go
@@ -437,8 +437,8 @@ func (o *OKCoin) GetFuturesPosition(symbol, contractType string) {
 
 func (o *OKCoin) Trade(amount, price float64, symbol, orderType string) {
 	v := url.Values{}
-	v.Set("amount", strconv.FormatFloat(amount, 'f', 8, 64))
-	v.Set("price", strconv.FormatFloat(price, 'f', 8, 64))
+	v.Set("amount", strconv.FormatFloat(amount, 'f', -1, 64))
+	v.Set("price", strconv.FormatFloat(price, 'f', -1, 64))
 	v.Set("symbol", symbol)
 	v.Set("type", orderType)
 
@@ -453,8 +453,8 @@ func (o *OKCoin) FuturesTrade(amount, price float64, matchPrice, leverage int64,
 	v := url.Values{}
 	v.Set("symbol", symbol)
 	v.Set("contract_type", contractType)
-	v.Set("price", strconv.FormatFloat(price, 'f', 8, 64))
-	v.Set("amount", strconv.FormatFloat(amount, 'f', 8, 64))
+	v.Set("price", strconv.FormatFloat(price, 'f', -1, 64))
+	v.Set("amount", strconv.FormatFloat(amount, 'f', -1, 64))
 	v.Set("type", orderType)
 	v.Set("match_price", strconv.FormatInt(matchPrice, 10))
 	v.Set("lever_rate", strconv.FormatInt(leverage, 10))
@@ -591,10 +591,10 @@ func (o *OKCoin) GetOrderHistory(orderID, pageLength, currentPage int64, orderTy
 func (o *OKCoin) Withdrawal(symbol string, fee float64, tradePWD, address string, amount float64) {
 	v := url.Values{}
 	v.Set("symbol", symbol)
-	v.Set("chargefee", strconv.FormatFloat(fee, 'f', 8, 64))
+	v.Set("chargefee", strconv.FormatFloat(fee, 'f', -1, 64))
 	v.Set("trade_pwd", tradePWD)
 	v.Set("withdraw_address", address)
-	v.Set("withdraw_amount", strconv.FormatFloat(amount, 'f', 8, 64))
+	v.Set("withdraw_amount", strconv.FormatFloat(amount, 'f', -1, 64))
 
 	err := o.SendAuthenticatedHTTPRequest("withdraw.do", v)
 
@@ -652,8 +652,8 @@ func (o *OKCoin) Borrow(symbol, days string, amount, rate float64) {
 	v := url.Values{}
 	v.Set("symbol", symbol)
 	v.Set("days", days)
-	v.Set("amount", strconv.FormatFloat(amount, 'f', 8, 64))
-	v.Set("rate", strconv.FormatFloat(rate, 'f', 8, 64))
+	v.Set("amount", strconv.FormatFloat(amount, 'f', -1, 64))
+	v.Set("rate", strconv.FormatFloat(rate, 'f', -1, 64))
 	err := o.SendAuthenticatedHTTPRequest("borrow_money.do", v)
 
 	if err != nil {
diff --git a/okcoinwebsocket.go b/okcoinwebsocket.go
index 52b7143f..2c2aad1f 100644
--- a/okcoinwebsocket.go
+++ b/okcoinwebsocket.go
@@ -254,8 +254,8 @@ func (o *OKCoin) WebsocketSpotTrade(symbol, orderType string, price, amount floa
 	values := make(map[string]string)
 	values["symbol"] = symbol
 	values["type"] = orderType
-	values["price"] = strconv.FormatFloat(price, 'f', 8, 64)
-	values["amount"] = strconv.FormatFloat(amount, 'f', 8, 64)
+	values["price"] = strconv.FormatFloat(price, 'f', -1, 64)
+	values["amount"] = strconv.FormatFloat(amount, 'f', -1, 64)
 	channel := ""
 
 	if o.WebsocketURL == OKCOIN_WEBSOCKET_URL_CHINA {
@@ -271,8 +271,8 @@ func (o *OKCoin) WebsocketFuturesTrade(symbol, contractType string, price, amoun
 	values := make(map[string]string)
 	values["symbol"] = symbol
 	values["contract_type"] = contractType
-	values["price"] = strconv.FormatFloat(price, 'f', 8, 64)
-	values["amount"] = strconv.FormatFloat(amount, 'f', 8, 64)
+	values["price"] = strconv.FormatFloat(price, 'f', -1, 64)
+	values["amount"] = strconv.FormatFloat(amount, 'f', -1, 64)
 	values["type"] = strconv.Itoa(orderType)
 	values["match_price"] = strconv.Itoa(matchPrice)
 	values["lever_rate"] = strconv.Itoa(orderType)