Return of Bollinger Bands based Signals not accurate

[AnAnalogGuy]

Setting money = 0 after each buy, altough there is money left as you do not buy fractions, makes you lose money in your profit calculation and has a severe impact on the return. Actually, with every buy transaction you make, you lose (money - (number of shares * price)), which, when i.e. Tesla noted around 350 would be an amount between 0 and 350, so in average 175 per transaction. Executing 19 trades as in your example leads to direct losses of 19 * 175 = 3325 on average. In your example, that's about 20% of your profit. In realtiy it would be even more as this money could be invested and would earn a return aswell.

Capstone-Project/functions.py

Line 115 in e861467

if money > 0:

That said: Without any correction, just runnig your example 5 years after you published it with Tesla having made two Splits in the meantime (5x, 3x) and the adjusted stock price in 2018 now being around 22 Dollars (was 350 -> 350 / 3 / 5), the result is:

Number of Trades: 19
Time Frame: 316 days
Profit: $17849.19 | 118.99%

This is about 15% higher than in your example, just for the fact that now the amount lost with each buy isn't between 0 and 350 but between 0 and 25.