fix: implement fixes suggested by @matebudai

examples/options-trading-mleg.ipynb

@@ -192,8 +192,8 @@
    "metadata": {},
    "cell_type": "code",
    "source": [
-    "# This is a function that will return a contract which minimizes an error from a target price\n",
-    "def get_least_error_contract(contracts, target_price):\n",
+    "# This is a function that will return a contract which minimizes the difference from a target price\n",
+    "def find_nearest_strike_contract(contracts, target_price):\n",
     "    min_error = 0\n",
     "    min_contract = None\n",
     "    for contract in contracts:\n",
@@ -233,7 +233,7 @@
     "    )\n",
     "    cts = trade_client.get_option_contracts(req)\n",
     "\n",
-    "    c = get_least_error_contract(cts.option_contracts, optimal_price)\n",
+    "    c = find_nearest_strike_contract(cts.option_contracts, optimal_price)\n",
     "    order_legs.append(OptionLegRequest(\n",
     "        symbol=c.symbol,\n",
     "        side=OrderSide.BUY,\n",
@@ -308,8 +308,8 @@
    "metadata": {},
    "cell_type": "code",
    "source": [
-    "# At the time of writing, TSLA has a standard deviation of 5.02 and a price of 413.82\n",
-    "# Let's create a moat around the current price such that B and C are a standard deviation away from each other\n",
+    "# At the time of writing, TSLA has a standard deviation (a common measure of variation for the price) of 5.02 and a price of 413.82\n",
+    "# Let's create a interval around the current price such that B and C are a standard deviation away from each other\n",
     "\n",
     "stddev = 5.02\n",
     "B = optimal_price - (stddev / 2)\n",
@@ -382,7 +382,7 @@
    "metadata": {},
    "cell_type": "code",
    "source": [
-    "# This is a function that will return a contract which minimizes an error from a target price\n",
+    "# This finds contracts which minimizes the difference from a set of target prices\n",
     "class ContractBuffer:\n",
     "    def __init__(self, optimal, is_call, is_buy):\n",
     "        self.optimal = optimal\n",
@@ -403,9 +403,9 @@
     "        is_call = contract.type == ContractType.CALL\n",
     "        if buff.is_call != is_call:\n",
     "            continue\n",
-    "        error = abs(float(contract.strike_price) - buff.optimal)\n",
-    "        if error < buff.err or buff.contract is None:\n",
-    "            buff.err = error\n",
+    "        diff = abs(float(contract.strike_price) - buff.optimal)\n",
+    "        if diff < buff.err or buff.contract is None:\n",
+    "            buff.err = diff\n",
     "            buff.contract = contract\n",
     "\n",
     "order_legs_m = []\n",