diff --git a/src/adv_types.py b/src/adv_types.py
new file mode 100644
index 0000000..c729109
--- /dev/null
+++ b/src/adv_types.py
@@ -0,0 +1,57 @@
+import struct
+
+def pwp_number(fmt):
+    size = struct.calcsize(fmt)
+
+    def decorator(cls):
+        def __init__(self, value):
+            self.value = value
+
+        def to_com(self):
+            return struct.pack(fmt, self.value)
+
+        @classmethod
+        def from_com(cls, data, offset=0):
+            value = struct.unpack_from(fmt, data, offset)[0]
+            return cls(value), offset + size
+
+        cls.__init__ = __init__
+        cls.to_com = to_com
+        cls.from_com = from_com
+
+        return cls
+
+    return decorator
+
+# Unsigned integers
+@pwp_number("<B")
+class u8: pass
+
+@pwp_number("<H")
+class u16: pass
+
+@pwp_number("<I")
+class u32: pass
+
+@pwp_number("<Q")
+class u64: pass
+
+# Signed integers
+@pwp_number("<b")
+class i8: pass
+
+@pwp_number("<h")
+class i16: pass
+
+@pwp_number("<i")
+class i32: pass
+
+@pwp_number("<q")
+class i64: pass
+
+# Floating point
+@pwp_number("<f")
+class f32: pass
+
+@pwp_number("<d")
+class f64: pass
\ No newline at end of file
diff --git a/src/general.py b/src/general.py
index 3e9fbfd..49af437 100644
--- a/src/general.py
+++ b/src/general.py
@@ -1,4 +1,5 @@
 from pwp import pwp, pwp_enum
+from adv_types import *
 import units
 
 @pwp_enum
@@ -18,8 +19,8 @@ class LogKind:
 class Signal:
     symbol: str
     kind: units.Direction
-    confidence: float
-    size: float
+    confidence: f32
+    size: f64
     price: units.USD
     take_profit: units.USD
     stop_loss: units.USD
diff --git a/src/pwp.py b/src/pwp.py
index e889321..3981724 100644
--- a/src/pwp.py
+++ b/src/pwp.py
@@ -1,13 +1,11 @@
 import struct
 import typing
 from typing import get_type_hints, get_origin, get_args
+from adv_types import *
 
 class PWPError(Exception):
     pass
 
-class uint8:
-    pass
-
 def encode_value(value, typ) -> bytes:
     origin = get_origin(typ)
 
@@ -23,7 +21,7 @@ def encode_value(value, typ) -> bytes:
             return b"\x01" + encode_value(value, real_type)
 
     # list[T]
-    if origin is list:
+    elif origin is list:
         item_type = get_args(typ)[0]
 
         out = len(value).to_bytes(4, "little")
@@ -62,10 +60,7 @@ def encode_value(value, typ) -> bytes:
     if typ is bool:
         return b"\x01" if value else b"\x00"
 
-    if typ is uint8:
-        return struct.pack("<B", value)
-
-    if hasattr(value, "to_com"):
+    if hasattr(typ, "to_com"):
         return value.to_com()
 
     raise PWPError(f"Unsupported type: {typ}")
@@ -147,12 +142,9 @@ def decode_value(data: bytes, offset: int, typ):
     if typ is bool:
         return data[offset] != 0, offset + 1
 
-    if typ is uint8:
-        return data[offset], offset + 1
-
     # nested PWP class
     if hasattr(typ, "from_com"):
-        return typ.from_com(data[offset:]), len(data)
+        return typ.from_com(data, offset)
 
     raise PWPError(f"Unsupported type: {typ}")
 
@@ -189,20 +181,23 @@ def pwp(cls):
 def pwp_enum(cls):
     variants = {}
 
-    for index, (name, value) in enumerate(cls.__dict__.items()):
+    index = 0
+    for idx, (name, value) in enumerate(cls.__dict__.items()):
         if isinstance(value, type) and value.__module__ == cls.__module__:
             value.__annotations__ = {
-                "_id": uint8,
+                "_id": u8,
                 **getattr(value, "__annotations__", {})
             }
 
-            value._id = index
+            value._id = u8(index)
 
             value = pwp(value)
 
-            variants[index] = value
+            variants[idx] = value
             setattr(cls, name, value)
 
+            index += 1
+
     @classmethod
     def from_com(enum_cls, data):
         enum_id = data[0]
diff --git a/src/units.py b/src/units.py
index dc8fea8..bc60577 100644
--- a/src/units.py
+++ b/src/units.py
@@ -1,4 +1,5 @@
 from pwp import pwp, pwp_enum
+from adv_types import *
 
 @pwp
 class Symbol:
@@ -6,7 +7,7 @@ class Symbol:
 
 @pwp
 class USD:
-    unit: float
+    unit: f64
 
 @pwp_enum
 class Direction: