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docs/ccxt/wiki/examples/py/bitmex-order-value.md

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+- [Bitmex Order Value](./examples/py/)
+
+
+ ```python
+ # -*- coding: utf-8 -*-
+
+import os
+import sys
+
+
+import ccxt  # noqa: E402
+
+
+exchange = ccxt.bitmex()
+
+markets = exchange.load_markets()
+symbol = 'XBTU20'
+market = exchange.market(symbol)
+
+units = {
+    'XBT':  { 'decimals': 4, 'multiplier': 1, 'name': 'bitcoin' },
+    'mXBT': { 'decimals': 3, 'multiplier': 1000, 'name': 'milli-bitcoin'  },
+    'μXBT': { 'decimals': 1, 'multiplier': 1000000, 'name': 'micro-bitcoin' },
+    'XBt':  { 'decimals': 0, 'multiplier': 100000000, 'name': 'satoshi' },
+}
+
+# the following calculation depends on contract specifications
+# one XBTU20 contract = 1 USD in Bitcoin
+
+num_contracts = 1
+
+while True:
+    try:
+        ticker = exchange.fetch_ticker(symbol)
+        last_price = ticker['last']
+        value = num_contracts / last_price
+        print('---------------------------------------------------------------')
+        print(exchange.iso8601(exchange.milliseconds()))
+        for unit in units:
+            multiplier = units[unit]['multiplier']
+            decimals = units[unit]['decimals']
+            name = units[unit]['name']
+            rounded_value = exchange.decimal_to_precision(value * multiplier, ccxt.ROUND, decimals)  # alternatively, use ccxt.TRUNCATE here
+            print(num_contracts, symbol, 'contracts =', rounded_value, unit, '(' + name + ')')
+    except Exception as e:
+        pass
+ 
+```