README.txt in iron_warbler-2.0.7.38 vs README.txt in iron_warbler-2.0.7.39

@@ -8,5 +8,10 @@
 = Use =
 
 calculator: https://www.omnicalculator.com/finance/black-scholes
 
 From: https://pythoninoffice.com/calculate-black-scholes-option-price-in-python/
+
+= schwab =
+== swagger ==
+
+* https://developer.schwab.com/products/trader-api--individual