Let's say I wanna invest in DOTBTC.
The price is 0.00027360.
I wanna invest $20.
How do I work out the amount of coin I should be buying given the current price?
JH
Convert $20 to btc
$20 = 0.000518
BTC @ current price of $39,600
Now, DOT/BTC @ price of 0.00027360
0.000518 0.0002735 = 1.8932 DOT ( Amount of coin to buy)
To attain $100 gain, let the new price be N
$100 = 0.002525
BTC 1.8932 X N = 0.002525
BTC N =
0.002525 1.8932. = 0.00133 ( New price to get $100 gain)